Questions on Algebra: Probability and statistics answered by real tutors!

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 Algebra: Probability and statistics Solvers Lessons Answers archive Quiz In Depth

 Question 301112: mary tosses three coin at one time. if she gets anything but 3 tails, she loses. what is the probability that she loses? Click here to see answer by richwmiller(9144)

 Question 301134: Of graduating high school seniors, 14% said that their generation will be remembered for their social concerns. If 58 graduating seniors are selected at random, find the probability that at least 31 of them will say their generation will be remembered for their social concerns. Click here to see answer by stanbon(57984)

 Question 301185: There is a company that has a product which lasts with a mean of 18 months and standard deviation of 3 months. The company can only afford to replace 2% of the products. How many months should the warranty be? Click here to see answer by stanbon(57984)

 Question 301274: In a population of 14 students 8 prefer Coke, the remainder Pepsi. If a sample of size 9 is taken, what is the chance that exactly 5 prefer Coke? Click here to see answer by stanbon(57984)

 Question 301258: A bag contains balls numbered 1,2,3 first a ball is drawn from the bag and a fair coin is tosed the number of times as the number shown on the drawn ball.find the mean of number of heads? Click here to see answer by Edwin McCravy(8999)

 Question 301289: Suppose 39 newly created pairs of jeans are placed in a bin to be checked for quality. Of these, 4 will not be of high enough quality to sell. Suppose that two pairs of jeans are randomly selected, without replacement, from the bin. What is the chance that both pairs of jeans selected will be substandard? Click here to see answer by stanbon(57984)

 Question 301317: Suppose 2 cards are drawn without replacement from an ordinary deck of 52. Find the probabilities of the following results. 23. Both cards are spades. Click here to see answer by Fombitz(13828)

 Question 301395: A deck of cards is numbered 1 to 35 if you draw one card at random what is the probability that the card you draw will have 4 as a factor? Click here to see answer by Fombitz(13828)

 Question 301427: a bag contains 4 red, 5 white, and 3 blue marbles. Find the probability of obtaining a red or white marble in a single draw. compute the mean, the 5% trimmed mean, and the 10% trimmed mean for the scores. Be sure to label which is which round to the nearest tenth, if necessary. 56.46,88,50,65,56,77,79,100,70,66,14,72,51,52,53,84,57,83,68. show your work Click here to see answer by Fombitz(13828)

 Question 301350: what is .65 percent of a population of 13,000 people? Click here to see answer by checkley77(12569)

 Question 301480: The letters of the word Mississippi are placed in a hat. What is the probability that the first two letters drawn are both i if the first letter drawn is not replaced? Click here to see answer by stanbon(57984)

 Question 301443: determine the sample size required to be 95% confident that the percentage of adults who text (claimed to be 22% in a random sample of 135 adults) is in error by no more than 3 percentage points. identify all variable used in your calculation. Click here to see answer by stanbon(57984)

 Question 301291: If North American casino roulette were fair, how much should it pay to a player who bets \$100 on black and a black number comes up? The odds against winning a bet on a black in roulette are 1.01 to 1. Click here to see answer by stanbon(57984)

 Question 301502: If you have 8 pairs of shoes (16 individual shoes) you randomly choose 1 shoe, and without replacing it, you randomly choose another what is the probability that you choose a matching pair? Click here to see answer by stanbon(57984)

 Question 301549: You work at a T-shirt printing business. 564 of 4,700 T-shirts shipped are printed improperly. Predict the number of improperly printed T-shirts in a batch of 2,000. Click here to see answer by rfer(12731)

 Question 301590: A phatmaceutical firm claims that only ten percent of new drugs show to be effective in animal tests ever make it through clinical tests and to the market. If a firm has 15 new compounds shown to be effective in animals calculate P(none will reach the market) and P(at most one will reach the market). Also I have to calculate the mean and variance of the number of compounds that will reach the market. Any help would be great - final is tomorrow and am completely confused. Thanks! Click here to see answer by richwmiller(9144)

 Question 301564: Slove. Researchers marked and released 36 pike in a pond. Later they counted 20 pike, 12 of which were marked. Estimate the pike population. Click here to see answer by richwmiller(9144)

 Question 301566: Solve. How many two-letter permutations can be made from the letters L, M, N, O, and P? Click here to see answer by nyc_function(2733)

 Question 301664: If a two-sided coin is flipped 4 times, what is the probability that at least one head will show up? Click here to see answer by richwmiller(9144)

 Question 301618: A box contain 74 brass washers ,86 steel washers and 40 aluminium washers three washers are down at random from the box without replacement .Determine the probability that all three are steel washers Click here to see answer by Fombitz(13828)

 Question 301619: A box contain 74 brass washers ,86 steel washers and 40 aluminium washers three washers are down at random from the box without replacement .Determine the probability that all three are steel washers Click here to see answer by Fombitz(13828)

 Question 301578: A restaurant offers the following choices for breakfast: Eggs: scrambled, fried, or poached Meat: bacon, sausage, or ham Toast: wheat, white, rye, or pumpernickel 26. How many different breakfast combinations are possible if one item is selected from each list of eggs, meat,and toast choices? Click here to see answer by Fombitz(13828)

 Question 301693: How do you solve the following A Social Security is a code made up of 3 digits - 2 digits - 4 digits. If repetition of numbers were not permitted in ss numbers how many different ss # would be possible? Click here to see answer by Alan3354(31538)

 Question 301727: Suppose that the variable X is normally distributed with a mean of 200 and a standard deviation of 25. (i) What proportion of X-values lies between 180 and 205? (ii) Below what value do 30 per cent of X-values lie? Click here to see answer by Fombitz(13828)

 Question 301603: You are trying to collect all nine baseball cards for an All-Star team. Each package of cards he can buy has one card of a member of the team.The cards are equally distributed among all the packages. How could you use a simulation to estimate the number of packages of cards you will need to buy to get all nine cards? Click here to see answer by stanbon(57984)

 Question 301614: You are trying to collect all nine baseball cards for an All-Star team. Each package of cards he can buy has one card of a member of the team.The cards are equally distributed among all the packages. How could you use a simulation to estimate the number of packages of cards you will need to buy to get all nine cards? Click here to see answer by stanbon(57984)

 Question 301612: You are trying to collect all nine baseball cards for an All-Star team. Each package of cards he can buy has one card of a member of the team.The cards are equally distributed among all the packages. How could you use a simulation to estimate the number of packages of cards you will need to buy to get all nine cards? Click here to see answer by stanbon(57984)

 Question 301787: The critical value Zc that corresponds to a 90% confidence level is: The critical value Zc that corresponds to a 95% confidence level is: The critical value Zc that corresponds to a 99% confidence level is: Click here to see answer by stanbon(57984)

 Question 301947: A list of numbers consists of p positive and n negative numbers. If a numbers is picked at random from this list, the probability that the number is positive is 3/5. What is the value of n/p? A. 3/8 B. 5/8 C. 2/3 D. 3/2 E. 8/3 Click here to see answer by london maths tutor(243)

 Question 301945: Hospital administrators wish to determine the average length of stay for all surgical patients. A statistician determines that a 95% confidence level estimate of the average length of stay to within 0.50 days, 100 surgical patients' records would have to be examined. How many records should be looked at for a 95% confidence level within 0.25 days? Click here to see answer by stanbon(57984)

 Question 302030: The Everton College store paid \$1755 for an order of 49 calculators. The store paid \$8 for each scientific calculator. The others, all graphing calculators, cost the store \$55 each. How many of each type of calculator was ordered? Click here to see answer by josmiceli(9819)

 Question 302071: Suppose 5 fair 6-sided dice are thrown at a time and they are independant of each other. What is the probability that exactly 3 of the dice are 1's? What is the probabilty that exactly 3 of the dice are any of the same number? Click here to see answer by stanbon(57984)

 Question 301994: for a boy having 6 friends how many ways are there to invite 1 or more of them to the lunch? Click here to see answer by stanbon(57984)

 Question 301992: in how many ways can the letters of the word PERIMETER be arranged? also arrange four different letters of the word in a row? Click here to see answer by stanbon(57984)

 Question 302125: I need help with this problem. A machine produces 9 inch latex gloves. A sample of 68 gloves is selected, and it is found that 42 are shorter than they should be. Find the 98% confidence interval on the proportion of all such gloves that are shorter than 9 inches. Thanks Aquanetta Mixon Click here to see answer by stanbon(57984)

 Question 302149: Locks combinations are made by using 4 digits. How many different lock combinations can be made if repetition of digits is allowed Click here to see answer by stanbon(57984)

 Question 302160: 3. Which of the following experiments does NOT have equally likely outcomes? Choose a number at random from 1 to 7. Toss a coin. Choose a letter at random from the word SCHOOL. None of the above. I am a substitute teacher who teaches K-6. I can complete all the probability problems except this one that I found on a web-site. I must have a mental block. Click here to see answer by scott8148(6628)

 Question 302159: 3. Which of the following experiments does NOT have equally likely outcomes? Choose a number at random from 1 to 7. Toss a coin. Choose a letter at random from the word SCHOOL. None of the above. RESULTS BOX: I am a substitute teacher who teaches K-6. I can complete all the probability problems except this one that I found on a web-site. I must have a mental block. Click here to see answer by Theo(3504)

 Question 302158: 3. Which of the following experiments does NOT have equally likely outcomes? Choose a number at random from 1 to 7. Toss a coin. Choose a letter at random from the word SCHOOL. None of the above. RESULTS BOX: I am a substitute teacher who teaches K-6. I can complete all the probability problems except this one that I fount on a web-site. I must have a mental block. Click here to see answer by stanbon(57984)

 Question 302139: A persons body temperature is found to be 101.00 degrees F. Is the result unusual? Why or why not? What should you conclude? Click here to see answer by stanbon(57984)

 Question 302134: Is a body temperature of 99.00 degrees F. unusual? Why or why not Click here to see answer by Alan3354(31538)

 Question 302210: two dice are rolled. Find the probability that the score on the dice is either 7 or 9 Click here to see answer by stanbon(57984)

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3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 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