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Tutors Answer Your Questions about Probability-and-statistics (FREE)
Question 118734: A coin is tossed three times. Use this information to solve these problems.
1.) List the sample space.
2.) Find the probability of tossing heads exactly twice.
3.) Find the probability of tossing tails at least twice.
Any help would be great! Thanks
Click here to see answer by bucky(1732)   |
Question 118733: A restaurant offers the following choices for breakfast:
Eggs: scrambled, fried, or poached
Meat: bacon, sausage, or ham
Toast: wheat, white, rye, or pumpernickel
Here is the question:,
The Super Breakfast allows you to select two items from the meat list. How many breakfast combinations are possible if you select one each of the eggs and toast choices and two different meat choices?
Any help would be awesome because I am stuck!
Click here to see answer by checkley71(8405) |
Question 118732: A restaurant offers the following choices for breakfast:
Eggs: scrambled, fried, or poached Meat: bacon, sausage, or ham
Toast: wheat, white, rye, or pumpernickel
Here is the question:,
How many different breakfast combinations are possible if one item is selected from each list of eggs, meat, and toast choices?
Please help any help would be awesome!
Click here to see answer by checkley71(8405) |
Question 118732: A restaurant offers the following choices for breakfast:
Eggs: scrambled, fried, or poached Meat: bacon, sausage, or ham
Toast: wheat, white, rye, or pumpernickel
Here is the question:,
How many different breakfast combinations are possible if one item is selected from each list of eggs, meat, and toast choices?
Please help any help would be awesome!
Click here to see answer by Edwin McCravy(2920) |
Question 118758: I am completely stumped on this one:
3 colleges participated in a track and field competition. Each college sent only 1 representative to each event. Jessica a student at Kennedy college went to the competition to cheer on her boyfriend the long jump champion.
After the competition her roommate asked her how their school performed. Jessica told her they won the long jump but Jefferson College won the competition with 22 points. Kennedy and Adams college only got 9 points.
Kelly asked what the point system was. Jessica didn't know but said they gave a different number of points for each place and awarded points for 1st, 2nd & 3rd and the point system was the same for each event.
Kelly asked how many events there were but Jessica didn't know that either.
Kelly's friend Jack asked if there was a javelin throw. Jessica said there was. Jack asked who won but Jessica didn't know.
Here is the problem question: Who won the javelin throw? I have to clearly and logically show how I got my answer. No guessing and I have to use math and logic to solve it.
Click here to see answer by scott8148(3382)  |
Question 118972: Find the indicated measure
A building cast a shadow of a 18 feet long.A woman standing near the building is 5 feet 8 inches tall and casts a shadow 4 feet long. What is the height of the building in feet and inches?
Any help with this equation would be Greatly appreciated.
Click here to see answer by solver91311(5072)  |
Question 119143: I'm not sure if I choose the right type I am sorry if it is not.
27 people applied for a certain managerial job. According to one report, the first interview narrowed the field down to fewer than 7 candidates.Another report claimed that the first interview eliminated fewer than 23 applicants from consideration. If both reports are true, and if x applicants were eliminated by the first interview, what are the possible values of x?
a)21 only
b)22 only
c)20 and 21 only
d)21 and 22 only
e)21,22, and 23 only
I don't know what type of math to use to solve this problem. Thank you very much for your help, it is greatly appreciated.
Click here to see answer by Fombitz(2113)  |
Question 119092: pls answer this question for me..
" if an experiment consist of tossing a die once and drawing 2 balls in succession w/ replacement if the outcome in the die is a prime number, otherwise balls are drawn w/o replacement.
(note: 1 is not a prime number; the urn contains 2 red and 1 black balls)
find the probability that:
a. the balls are drawn w/o replacement.
b. ball drawn include at least 1 red ball in (w/ replacement, w/o replacement).
c. the balls drawn are of different colors in(w/ replacement, w/o replacement).
d. the ball drawn are both black given that the outcome in the die is prime in
(w/ replacement, w/o replacement).
please help me answer this problem.. a million thanks!
Click here to see answer by solver91311(5072) |
Question 119254: Im really struggling with this problem and need help...
Apply the Law of Large Numbers
1. Using a coin toss and fictitious data, explain how the following scenario is possible: As the number of trials increases, the differences between the number of actual and expected successes tends to grow, but the difference between the percentage of actual and expected successes tends to decrease.
Thank you..I really appreciate it..!!
Click here to see answer by scott8148(3382) |
Question 119319: Each of the letters D E T E R M I N E D is written on a card. YOu mix the cards thoroughly. What is the probability of selecting an E, then an M? The first card is replaced before selecting the second card.
Click here to see answer by stanbon(26259) |
Question 119319: Each of the letters D E T E R M I N E D is written on a card. YOu mix the cards thoroughly. What is the probability of selecting an E, then an M? The first card is replaced before selecting the second card.
Click here to see answer by Fombitz(2113) |
Question 119471: sirs,
please help me regarding this problem:
"there are 3 urns containing several balls. Urn 1 has 5 white, 3 green, and 2 red balls. Urn 2 contains 1 white, 6 green and 3 red balls. Urn 3 contains 3 white, 1 green and 6 red balls. a die is tossed once. if 1 appears, a ball is drawn from urn 1. if 2 or 3 appears, a ball is drawn from urn 2. otherwise, a ball is drawn from urn 3. determine (a) the probability that a red ball is chosen, and (b) the probability that urn 3 is chosen, given that the red ball is chosen."
thank you very much
sincerely,
cebrian
Click here to see answer by Fombitz(2113) |
Question 119633This question is from textbook
: In the carnival game "chuck-a-luck," you pick a number from 1 to 6 and roll 3 dice in succession. If your number comes up all 3 times, you win $3; if your number comes up twice, you win $2; if it comes up once, you win $1; otherwise you lose $1. What is your expected gain or loss?This question is from textbook
Click here to see answer by stanbon(26259) |
Question 119565: This is not out of a book this is homework - any help is greatly appreciated.
A machine is set to fill a small bottle with 9.0 grams of medicine. A sample of eight bottles revealed the following amounts (grams) in each bottle.
9.2 8.7 8.9 8.6 8.8 8.5 8.7 9.0
At the .01 significance level, can we conclude that the mean weight is less than 9.0 grams?
a. State the null hypothesis and the alternate hypothesis.
b. How many degrees of freedom are there?
c. Give the decision rule.
d. Compute the value of t. What is your decision regarding the null
hypothesis?
e. Estimate the p-value.
Click here to see answer by stanbon(26259) |
Question 119953: I need some major help with this problem. I've been working on it for 2 weeks and I keep getting it WRONG or I just dont know what I'm doing! I appreciate any help!
Given:
There are two companies that sell widgets. Both companies sell the widgets to the general public for the same price. In order to earn business, Company A offers a special 25% discount on each order. In response, Company B offers a 35% discount on every dollar the customer spends over $50. Both discounts are rounded to the nearest cent. If you place an order for $50 or less, it is less expensive to order from Company A. If you place a large enough order, it will be less expensive to order from Company B. At what price does it become less expensive to order from Company B?
Task:
A. You can estimate the answer by considering hypothetical orders and comparing the discounts each company would provide.
1. Create and properly label a table of data demonstrating this technique. The table should include at least four hypothetical orders and should estimate the answer within a $50 range. Each row will represent a hypothetical order. The first row will represent a $50 order and each additional row will represent orders in $50 increments (i.e., $100, $150). The table should include three columns. The first column is the order amount, the second column is the discount that Company A would give, and the third column is the discount Company B would give.
2. Specify the $50 range that the answer could be within.
3. Explain how you used your table to determine this.
B. Determine algebraically the actual price at which Company B offers you the same discount as Company A. Make sure to show all relevant work.
C. Determine the actual price at which Company B will give you a greater discount than Company A.
1. Explain how you reached this conclusion.
Click here to see answer by stanbon(26259) |
Question 120561: Jerry worked for one day on a project that he could have completed alone in nine days. Bill joined Jerry the next day, and they worked together for exactly three days to complete the project. How much of the job did Bill do in those three days? Express you answer as a common fraction.
Bill worked 3 out of 4 days, but it could have been done in 9 days which would be 8 out of 9 days for Bill if he was working alone. Jerry worked 1 day out of 4 and 1 day out of 9 possible days.
3/4 x 8/9 = 24/36 = 2/3
I say the answer is 2/3 for how much of the work Bill did.
Click here to see answer by ankor@dixie-net.com(6691)  |
Question 120750This question is from textbook Pre-Algebra
: Your computer password has 4 capital letters followed by 4 digits. Your friend randomly chooses 4 capital letters and 4 digits. Find the probability that your friend chooses your password
Thanks for your help!
beckmangn@wowway.comThis question is from textbook Pre-Algebra
Click here to see answer by rapaljer(3611) |
Question 120568: Once again, I am stuck on a word problem. I could really use someones help with this. Thanks so much!
By using a ruler, you determine that the distance between two cities on a map is 3.4 inches. According to the map’s scale, 2 inches represents 75 miles. What is the actual distance between the two cities?
A. Briefly explain the general procedure used to identify and set up a proportion problem.
B. Write a proportion that correctly represents the problem in the Given.
1. Solve the proportion, showing all relevant work.
C. Explain the reasoning behind the equation you set up (e.g., how did you determine the two ratios in the problem, and how do you know if they are equivalent?).
D. Explain each step used to solve the equation. Your explanation should include the original equation, the equation at each step, and the final equation with the unknown equal to some number. (Use complete sentences, not mathematical symbols, to explain the steps.)
E. Briefly explain (in 1–2 sentences) what the answer means in terms of the original problem.
Click here to see answer by stanbon(26259) |
Question 120952: So that zip codes may be machine readable, the postal service encodes them as a group five bars, some tall, some short, in groups osf five. In how many distinct ways can two tall and three short bars be arranged?
Click here to see answer by stanbon(26259) |
Question 121258: Please help me with this problem..
Currently, Person A has $60 and Person B has $135. Person A decides to save $5 of his/her paycheck each week, while Person B decides to spend all of his/her paycheck and an additional $10 each week. How long will it be before Person A and Person B have the same amount of money? The following represents the situation:
Person A's Current Savings
+ 5 ×
Number of Weeks
=
Person B's Current Savings
– 10 ×
Number of Weeks
Task:
A. Write an equation describing the situation in the Given.
B. Solve the equation written in A.
C. Using an appropriate technological tool of your choice, make a properly labeled graph of the situation. Is your solution from B correct? Explain your reasoning.
D. Based on your graph, what can you conclude about the difference in amounts of money each person has after week 5?
Thank you so much!
Click here to see answer by stanbon(26259) |
Question 121514: Please help this needs to be done by tonight January 21 and I'm lost
If you use Excel, submit a single Excel attachment with labeled tabs; please do not submit multiple Excel attachments. A PowerPoint attachment is OK, too. I’ll deduct a point for every extra attachment.
2 - Research at the University of Toledo indicates that 50 percent of the students change their major area of study after their first year in a program. A random sample of 100 students in the College of Business revealed that 48 had changed their major area of study after their first year of the program. Has there been a significant decrease in the proportion of students who change their major after the first year in this program? Test at the .05 level of significance.
Click here to see answer by stanbon(26259) |
Question 122049This question is from textbook
: Hypothesis testing
A recent article in the Wall Street Journal reported that the 30-year mortgage rate is now less than 6 percent. A sample of eight small banks in the Midwest revealed the following 30- year rates (in percent):
4.8 5.3 6.5 4.8 6.1 5.8 6.2 5.6
At the .01 significance level, can we conclude that the 30-year mortgage rate for small banks is less than 6 percent? Estimate the p-value.
This question is from textbook
Click here to see answer by stanbon(26259) |
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