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Tutors Answer Your Questions about Probability-and-statistics (FREE)
Question 126822: A box of chocolates contains 20 identically shaped chocolates. Five of them are filled with jelly, three are filled with caramel, and twelve are filled with nuts. What is the probability that one chocolate chosen at random is filled with jelly, caramel, or nuts?
Click here to see answer by solver91311(5072)   |
Question 126818: How do I answer this question?
The odds against WildHorse winning the third race are 11:2. If Molly places a $4 bet on WildHorse to win and WildHorse wins, find Molly’s net winnings
A) $5.50 B) $44 C) $16.50 D) $11 E) $22
Click here to see answer by stanbon(26259)  |
Question 126952: If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together? I'm not sure if this is the section for this problem but if tutor can help i would greatly be appretiated,thanks
Click here to see answer by josmiceli(3003) |
Question 126962: I tried this question last night and this morning, and I'm still at a standstill. Can someone provide some help? Thanks.
An independent television station airs a movie-of-the-week every Wednesday. Their market research shows that their horror movies are viewed by an average of 2600 people, their comedies are viewed by 4200 people, and their dramas are viewed by 8000 people. The station buys a package of 50 movies, consisting of 5 horror movies, 20 comedies, and 25 dramas. The movies will be shown one per week for 50 weeks. Find the expected number of viewers on a given movie.
A. 5940 B. 5560 C. 4360 D. 6920 D. 5400
Click here to see answer by CHFS22144(5) |
Question 126960: Here's a probability question that I figured the answer would be .63 or 63%. I divided 25/40, that seems too easy. Is my answer correct?
The last 40 violent crimes committed in Sconeville were 2 homicides, 25 robberies, and 13 assaults. What is the empirical probability that the next violent crime committed in Sconeville will be a robbery?
Click here to see answer by CHFS22144(5) |
Question 126971: A box of chocolates contain 20 identically shaped chocolates. Five of them are filled with jelly, three are filled caramel, and twelve are filled with nuts. What is the probability that one chocolate chosen at random is filled with jelly, caramel, or nuts?
Click here to see answer by stanbon(26259) |
Question 126968: Question 15.18 from Applied Statistics in Business and Economics, by Doane and Seward:
Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. Research question: At , is the degree of certainty independent of credits earned?
Credits Earned 0-9 10-59 60+ Col Total
Very uncertain 12 8 1 21
Somewhat certain 8 4 7 19
Very certain 3 10 11 24
Row Total 23 22 19
Click here to see answer by stanbon(26259) |
Question 126957: I've tried to answer this question and still can't come up with the answer. Can someone help me? Thanks.
Last fall, a gardener planted 65 iris bulbs. She found that only 56 of the bulbs bloomed in the spring.
a) Find the empirical probability that an iris bulb of this type will bloom
b) How many of the bulbs should she plant next fall if she would like at least 92 to bloom?
Click here to see answer by scott8148(3382)  |
Question 126963: I need to know if my answer is correct on this one. I constructed a diagram and listed the sample space as 8. I found the probability to be 1/4. Thanks.
A couple plan to have exactly three children.
(a) Construct a tree diagram and list the sample space.
(b) Find the probability that the family has at least two girls.
Click here to see answer by stanbon(26259) |
Question 127112: A man has 8 pairs of pants, 5 shirts, and 3 ties. How many different outfits can he wear?
I set up the problem as:
8 x 5 x 3 (120 different outfits is what I got)
I don't know if this is correct, my text book is not very forth coming and doesn't explain things very clearly. This question is not from the book, it is one of a set of mixed problems the instructor selects from a pool.
Thanks for your help
Click here to see answer by solver91311(5072) |
Question 127242: I am a senior in high school and want to know if my answer is correct. How many different ways are there for an admissions officer to select a group of 7 college candidates from a group of 19 applicants for an interview? Answer: 133
Click here to see answer by MathLover1(1183)  |
Question 127279: A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the other will fail?
Click here to see answer by stanbon(26259) |
Question 127237: A license plate is to consist of two letters followed by three digits. How many different license plates are possible if the first letter must be a vowel, and repetition of letters is not permitted, but repetition of digits is permitted?
Click here to see answer by checkley71(8405) |
Question 127322: Suppose that X has a distribution with m=72 and s=8 (greek symbols)
if random samples of size n=16 are selected, can we say anything about the x distribution of sample means?
if the original x distrubution is normal can we say anything about the x distribution of random samples of size 16? Find P(68
Click here to see answer by stanbon(26259) |
Question 127352This question is from textbook Applied Statistics in Business and Economics
: I see that the following problem had already been solved, but I want to understand why it was solved the way it was compared to how I thought it should be solved. Thanks in advance for your assistance in this matter!
A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations. (b) Calculate a p-value and interpret it.
Ho: p is equal to .50
Ha: p is not equal to .50
alpha=10%, x=38, n=60, p-hat=.63
Critical value: z=-1.645 and 1.645
(0.63-.50)/sqrt[.50*.50/60]=2.01395134
since z is greater than -1.645 and 1.645, the Ho should be rejected.
p-value=0.022007
Therefore, only 2.2% of test results could have given stronger evidence that the coin is biased away from p=.50
Thanks again for your assistance in this matter!
This question is from textbook Applied Statistics in Business and Economics
Click here to see answer by stanbon(26259) |
Question 127353: Can someone help me with this problem. I have part of the answer, but not the rest.
At an annual flower show, 6 different entries are to be arranged in a row.
a) How many different arrangements of the entries are possible? Answer: 6 x 5 x 4 x 3 x 2 x 1 = 720 different arrangements
b) If the owners of the 1st, 2nd, and 3rd place entries will be awarded prizes of $100, $50, and $25 respectively, how many ways can the prizes be awarded?
Click here to see answer by solver91311(5072) |
Question 127236: I don't know if these are correct answers, but can you tell me if they are?
Two balls are to be selected without replacement from a bag containing one red, one blue, one green, one yellow, and one black ball. How many points are there in the sample space? Answer: 3 points in the sample space
The odds against Thunderbolt winning the Sarasota Derby are 9: 2. Find the probability that Thunderbolt wins. Answer: 2/11 F=9; S=2 9+2=11; 2/11
Click here to see answer by solver91311(5072) |
Question 127239: The results of a survey for an airline are shown below
Traveler Male Female Total
Business 57 92 149
Vacation 72 74 146
Total 129 166 295
Use the chart to find the probability that the traveler was
a) male
b) on vacation given the traveler was male
c) female given the traveler was on business
Click here to see answer by scott8148(3382) |
Question 127447: Having trouble with getting breakdown on this, can anyone help?
Facing rising fax costs, a firm issued guidelines that transmissions of 10 pages or more should be done by 2 day mail instead. Exceptions are allowed, they want the average to be 10 or below. A firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages. (a) At the .01 level of significance, is the true mean greater than 10? (b) Use excel to find the right tail – p value.
Click here to see answer by stanbon(26259) |
Question 127478This question is from textbook Applied Statistics in Business and Eco
: An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocket patient billing above the reimbursed amount was $275.66 with a standard deviation of $78.11. (a) At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket?
State your hypotheses and decision rule. (b) Is this a close decision?
This question is from textbook Applied Statistics in Business and Eco
Click here to see answer by stanbon(26259) |
Question 127492This question is from textbook fundamentals of maths
: i am having difficulty doing these two problems. can you help.
a wallet contains a one-dollar bill,a twenty dollar bill,a five dollar bill, a ten dollar bill. If a bill is chosen at random, find the probability that the value of the bill is less than twenty dollars. Here is how i try to do it.
1+5+10 =16
16 divide 36
This question is from textbook fundamentals of maths
Click here to see answer by stanbon(26259) |
Question 127434: The Outdoor Furniture Corporation manufactures two products, benches and picnic tables, for use in yards and parks. The firm has two main resources: its carpenters (labor force) and a supply of redwood for use in the furniture. During the next production cycle, 1,200 hours of labor are available under a union agreement. The firm also has a stock of 3,500 feet of good quality redwood. Each bench that Outdoor Furniture produces requires 4 labor hours and 10 feet of redwood: each picnic table takes 6 labor hours and 35 feet of redwood. Completed benches will yield a profit of $9 each, and tables will result in a profit of $20 each. How many benches and tables should Outdoors Furniture produce to obtain the largest possible profit? Use graphical Linear programming approach.
Click here to see answer by ankor@dixie-net.com(6691)  |
Question 127434: The Outdoor Furniture Corporation manufactures two products, benches and picnic tables, for use in yards and parks. The firm has two main resources: its carpenters (labor force) and a supply of redwood for use in the furniture. During the next production cycle, 1,200 hours of labor are available under a union agreement. The firm also has a stock of 3,500 feet of good quality redwood. Each bench that Outdoor Furniture produces requires 4 labor hours and 10 feet of redwood: each picnic table takes 6 labor hours and 35 feet of redwood. Completed benches will yield a profit of $9 each, and tables will result in a profit of $20 each. How many benches and tables should Outdoors Furniture produce to obtain the largest possible profit? Use graphical Linear programming approach.
Click here to see answer by stanbon(26259) |
Question 127554This question is from textbook
: A quarter is flipped and a die is tossed, find the probability of obtaining tails
or a number divisible by 7. Here is how i try to do this.
H = 6
T = 6
p(6 times 6 = 36 times 7) wow this does not look right, can you help please?This question is from textbook
Click here to see answer by stanbon(26259) |
Question 127619: Please help me solve!
Pet Shop. A pet shop is selling a calico cat, a Siamese cat, a Persian cat, and a Himalayan cat. The Chens are going to select two cats to bring home as pets.
a) Determine the number of points in the sample space.
b) Construct a tree diagram and list the sample space.
Find the probability they select
c) the Persian cat
d) the Persian cat and the calico cat
e) cats other than the Persian cat
Thank you in advance
Click here to see answer by stanbon(26259) |
Question 127620: Please help me solve!
Assume that a hat contains four bills: a $1 bill, $5 bill, a $10 bill, and a $20 bill. Two bills are to be selected at random with replacement. Construct a sample space and find the probability that
26. both bills are $1 bills if the first selected is a $1 bill.
Click here to see answer by stanbon(26259) |
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