36. Two college roommates have each committed to donating to charity each week for the next year. Theroommates' weekly incomes are independent of each other. Suppose the amount donated in a week byone roommate is approximately normal with mean $30 and standard deviation $10, and the amount donatedin a week by the other roommate is approximately normal with mean $60 and standard deviation $20. Which ofthe following is closest to the expected number of weeks in a 52-week year that their combined donation willexceed $120 ?blow anoli(A) 0; the combined donation never exceeds $120 in a week(B) 1 week(C) 3 weeks(D) 5 weeks(E) 8 weeksbut I to Jason(A)sobota la to going 02 bassigma (0)

The objective of this question is to find the expected number of weeks in a year that the combined…

Answered: 36. Two college roommates have each…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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5
Two stores sell watermelons. At the first store the melons weigh an average of 22 pounds, with a standard deviation of 2.5 pounds. At the second store the melons are smaller. with a mean of 18 pounds and a standard deviation of 2 pounds. You take and SRS of 40 melons from the first store and SRS of 34 from the second store How would you describe each distribution?
14. College and University Debt A student graduated from a 4-year college with an outstanding loan of $9650 where the average debt is $8455 with a standard deviation of $1865. Another student graduated from a university with an outstanding loan of $12,360 where the average of the outstanding loans was $10,326 with a standard deviation of $2143. Which student had a higher debt in relationship to his or her peers?
Fast Auto Service provides oil and lube service for cars. It is known that the mean time taken for oil and lube service at this garage is 15 minutes per car and the standard deviation is 2.4 minutes. The management wants to promote the business by guaranteeing a maximum waiting time for its customers. If a customer's car is not serviced within that period, the customer will receive a 50% discount on the charges. The company wants to limit this discount to at most 3% of the customers. What should the maximum guaranteed waiting time be? Assume that the times taken for oil and lube service for all cars have a normal distribution.Round your answer to the nearest minute.
One year Perry had the lowest ERA (earned-run average, mean number of runs yielded per nine innings pitched) of any male pitcher at his school, with an ERA of 2.57. Also, Rita had the lowest ERA of any female pitcher at the school with an ERA of 3.26. For the males, the mean ERA was 4.304 and the standard deviation was 0.894. For the females, the mean ERA was 4.158 and the standard deviation was 0.519. Find their respective z-scores. Which player had the better year relative to their peers, Perry or Rita? (Note: In general, the lower the ERA, the better the pitcher.) Perry had an ERA with a z-score of Rita had an ERA with a z-score of (Round to two decimal places as needed.) Textbook Get more help - $ 1 G Search or type URL % 31 6 & 7 * 8 + ( 9 0 Clear all + Check answer delete
You are a newsvendor selling the San Pedro Times every morning. Before you get to work, you go to the printer and buy the day’s paper for $0.30 a copy. You sell a copy of the San Pedro Times for $1.10. Daily demand is distributed normally with mean = 265 and standard deviation = 53. At the end of each morning, any leftover copies are worthless and they go to a recycle bin.a. How many copies of the San Pedro Times should you buy each morning? (Use Excel's NORM.S.INV() function to find the z value. Round your z value to 2 decimal places and final answer to the nearest whole number.)b. Based on a, what is the probability that you will run out of stock? (Round your answer to the nearest whole number.)
A population has a mean of 75 and a standard deviation of 15. You randomly sample 9 from the population. What is the likelihood that the sample mean will fall between 70 and 80?
4
You hypothesize that people in stats classes are happier than people in all other classes. You compare happiness scores in three of your classes: Statistics, Developmental Psychology, and Social Psychology. In Statistics there are 15 students and the mean happiness rating is 23.1 with a standard deviation of 9.78. In Developmental Psychology there are 15 students and the mean happiness rating is 24.4 with a standard deviation of 2.92. In Social Psychology there are 15 students with a mean rating of 17.7 and standard deviation of 8.46. The sum of squares between groups is equal to 384. The sum of squares within groups is equal to 2461. Use the One-Way ANOVA calculation table to help calculate. What is the degrees of freedom between samples?
Please answer ASAP
A mechanic sells a brand of automobile tire that has a life expectancy that is normally distributed, with a mean life of 36,000 miles and a standard deviation of 2100 miles. He wants to give a guarantee for free replacement of tires that don't wear well. How should he word his guarantee if he is willing to replace approximately 10% of the tires? Click to view page 1 of the table. Click to view page 2 of the table. CHE Tires that wear out by miles will be replaced free of charge. (Round to the nearest mile as needed.)
Suppose that water usages in American showers are normally distributed, with an average shower using 17.1 gallons, and a standard deviation of 3.5 gallons. Estimate the percentage of showers that used(a) between 6.6 and 27.6 gallons.__________%(b) more than 27.6 gallons.__________ %(c) less than 13.6 gallons. __________%(d) between 13.6 and 27.6 gallons. __________% Answer the blanks.

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