# 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 695145: A social service agency finds that, on the average, 2.86 of every 100 families need help from the agency. About how many families can they expect to help in a town of 976 families? Click here to see answer by stanbon(60771)

 Question 695111: if an adult male is told that hie height is whithin 2 standard deviations of the mean of the normal distribution of heights of adult males what can he assume Click here to see answer by stanbon(60771)

 Question 694977: Three identical slips of paper with the numbers 1, 2, and 3 (one number on each slip) are placed in a box.One slip is randomly selected, and then,without replacement, a second slip is selected. Find the probability that the sum of the two numbers is even. Click here to see answer by stanbon(60771)

 Question 695074: There is 1 red ball, 1 blue ball, and 1 yellow ball in a hat. Two balls are selected. Construct a tree driagram and list the sample space if the selection is done. Click here to see answer by stanbon(60771)

 Question 695036: What is the probability of 2 aces being the show cards on a split deck of 52 cards Click here to see answer by stanbon(60771)

 Question 694933: If five cards are drawn from a standard deck without replacement, what is the probability of drawing: A full house (a three of a kind and a pair?) I'm not sure if it should be: (52/52)*(3/51)*(2/50)*(48/49)*(3/48)*5C3*5C2 or just: (52/52)*(3/51)*(2/50)*(48/49)*(3/48)*5C3 Please explain the 5C3 and 5C2 part. Click here to see answer by stanbon(60771)

 Question 695177: Assume that X is a number chosen at random from the set of integers between 1 and 14 both inclusive. What is the probability that X is an even number Click here to see answer by pmatei(79)

 Question 695191: The load L that a horizontal beam can safely support is directly proportional to the square of the depth, d, of the beam. A beam with a depth of 8 inches can safely support 800 pounds. a)Find the constant variation and write the variation equation b)Find the load that a similar beam with a depth of 6 inches can safely support. I set this up at a cross multiply problem and got the wrong answer, so I'm not sure where I went wrong. As for b, I'm not sure how to even go about solving that. Thanks so much! Click here to see answer by stanbon(60771)

 Question 695174: suppose you are using a=0.05 to test the claim that mu>14 using a p-value. you are given the sample statistics n=50 xbar=14.3 and s=1.2. find the p-value Click here to see answer by stanbon(60771)

 Question 694956: A set of normally distributed data has mean 47 s and standard deviation 0.6 s. Find the percentage of the data within these intervals: a. Between 46 and 47 s b. Greater than 1.5s above or below the mean Click here to see answer by stanbon(60771)

 Question 695224: The five letters of the word 'TIMES' are written on five cards, with one letter on each card. The five cards are shuffled and two of the cards are dealt face up in a line to form a word. Determine the probability that word so formed : a)is the word 'IT' b)contains only vowels c)contains only consonants Click here to see answer by stanbon(60771)

 Question 695227: A survey done for a magazine found that 77% of bike riders sometimes ride without a helmet. If four bike riders are randomly selected, find the probability that at least one of the riders does not wear a helmet at all times. Click here to see answer by stanbon(60771)

 Question 695377: If a coin is flipped 20 times, what is the probability of getting at least 5 coins in a row? I was using this streak calculator, but I don't know how to do it by hand. http://www.pulcinientertainment.com/info/Streak-Calculator-enter.html#ev-runs Click here to see answer by solver91311(18785)

 Question 695376: If a coin is flipped 20 times, what is the probability of getting 5 coins in a row? Click here to see answer by solver91311(18785)

 Question 695512: Hello there i have a question that i need to ask can you help me on this I have to pick any number from 1 to 30 at random.give the probability that i pick 5 Click here to see answer by zoomkaboom4(62)

 Question 695632: A yellow die and a brown die are rolled, and a coin is tossed. Use the Fundamental Principle of Counting to determine how many different outcomes are possible Click here to see answer by checkley79(3056)

 Question 695912: If you rolled a pair of fair dice 450 times, about how many times would you expect the sum of 8 to appear? Click here to see answer by Edwin McCravy(9717)

 Question 695916: There are 60 tables in a restaurant, with 25% of them seating 2 people. The tables remaining seat 4 people. How many seats are there in the restaurant? Click here to see answer by stanbon(60771)

 Question 695896: In a recent survey 80% of the citizens in the community favored the building of a municipal golf course. If you ask 15 citizens about this project find the probability that a. at least 9 favor the project b. exactly 9 favor the project c. less than 9 favor the project I cannot remember how to calculate this formula or use minitab to calculate it for me. Can you help? Click here to see answer by stanbon(60771)

 Question 695879: Of the members of a Boy scout troop, 15% have received the First Aid merit badge. If 40 Boy Scouts are selected at random, use the normal distribution as an approximation to the binomial distribution to find the probability that four or more will have the First Aid merit badge. MULTIPLE CHOICE: A)86.6% B)81.3% C)36.6% D)31.3% Click here to see answer by stanbon(60771)

 Question 695878: The average hourly wage of workers at a fast food restaurant is \$7.75. Assume the wages are normally distributed with a standard deviation of \$0.45. If a worker at this fast food restaurant is selected at random, what is the probability that the worker earns more than \$7.50 per hour? Click here to see answer by stanbon(60771)

 Question 695876: Ms. Swift's reading class can read an average of 170 words per minute with a standard deviation of 25 words per minute. The top 3% of the class is to receive a special award. What is the minimum number of words per minute a student would need to read in order to get the award? Assume the data is normally distributed. Click here to see answer by stanbon(60771)

 Question 695855: bags of mixed lollies are being made by selecting: 2 different lolly pops from a choice of 4 lollypops; 3 different caramels from a choice of 6 caramels and 5 jellybeans from 10 different flavours. how many different types of mixed lolly bags can be made? Click here to see answer by stanbon(60771)

 Question 695851: Use the given data to find the minimum sample size required to estimate the population proportion. 13) ^ ^ Margin of error: 0.04; confidence level: 94%; p and q unknown Click here to see answer by stanbon(60771)

 Question 695845: Find the probability of drawing a diamond card in each of the consecutive draws from a well shuffled pack of cards,if the card drawn is not replaced after the first draw. Click here to see answer by stanbon(60771)

 Question 695959: . Classify the following variable as nominal, ordinal, discrete, or continuous and state why it is such a variable: most popular coffee brand Click here to see answer by jim_thompson5910(29613)

 Question 696174: a card is chosen at random from a deck of 52 cards. it is replaced and a second card is chosen. what is the probability of choosing a king and an ace? Click here to see answer by stanbon(60771)

 Question 696175: A test if Ho: μ=60 versus Ha: μ ≠ 60 produces a sample mean of x =58 and a P-value of 0.04. At a level of significance α = 0.05, which of the following is an appropriate conclusion? 1. There is sufficient evidence to conclude that μ < 60. 2. There is sufficient evidence to conclude that μ = 60. 3. There is insufficient evidence to conclude that μ = 60. 4. There is insufficient evidence to conclude that μ ≠ 60. 5. There is sufficient evidence to conclude that μ ≠ 60. Click here to see answer by stanbon(60771)

 Question 696172: Let X be the number ofcorrect answers if a students guesses randomly from the 5 choices for each of the 25 questions. What is the probability distribution of X? Click here to see answer by stanbon(60771)

 Question 696164: an urn contain 7 red marbels and 3 white marbels, 3 marbels drawn from the urn one after another find the probality that first 2 are red and 3rd is white if , condition a marbels drawn are replaced after evary draw . condition b: marbel drawan are not replace after every draw Click here to see answer by stanbon(60771)

 Question 696244: what is the possibility of getting 9 out of 9 questions right on a test? what is the possibility of getting 0 out of 9 questions right on a test? Click here to see answer by solver91311(18785)

 Question 696200: Hello, I need some assitance with the following question, please. You are rolling a 20-sided die where the sides are numbered 1 through 20. Find the odds in favor of rolling a number less than 6. I know there are 5 number less than 6, so 5 will go on top. But for the bottom, I'm thinking it is 15, as that is the amount that is not less than five. Is that correct? Thank you! Click here to see answer by checkley79(3056)

 Question 696298: For this assignment, you are required to visit a college near you. Contact your instructor if you have limitations to a local college visitation. Find out the age group of participants who are freshman, sophomores, juniors, and seniors. You need to find the age of 10 participants across each level. Compute a one-way ANOVA to determine whether there are significant age differences across years in college (freshman, sophomores, juniors, and seniors). Report your results in the APA format and write a short interpretation. Save the SPSS output. MUST BE DONE IS SPSS Click here to see answer by MathTherapy(1817)

 Question 696377: There is a raffle which has a limit of 600 tickets and fifteen prizes. You buy three and win two prizes. What are the odds on this? I understand what the odds are if you were to win 1 prize....I believe 1-585/600^3 (excuse the notation!).....but what about winning two......or even three???? Click here to see answer by stanbon(60771)

 Question 696523: Find the probability of drawing a diamond card in each of the consecutive draws from a well shuffled pack of cards,if the card drawn is not replaced after the first draw. Click here to see answer by stanbon(60771)

 Question 696530: (b) A bag contain 5 white , 7 red and 8 black balls. If four balls are drawn one by one without replacement, find the probability of getting all white balls. Click here to see answer by Edwin McCravy(9717)

 Question 696560: how many three digit numerals for numbers divisible by five can be formed from the digits 0,1,2,3,4,5,6 if no digit may be used more than once Click here to see answer by Edwin McCravy(9717)

 Question 696546: If i wanted to pick 4 people from a class of 11 people, are there more ways to do this if order didn't matter, or less ways, or the same? In other words which one has more wats, or are they the same? Please help. Your help is greatly appreciated. Have a happy and safe New Years Click here to see answer by Edwin McCravy(9717)