Dr. Lisa Williams is the founder of Fresh Dolls, a collection of diverse andmulticultural dolls. Fresh Dolls can be purchased in retail stores, such asWalmart, and also from various online sites. Suppose the number of Fresh Dollssold per day has an approximate normal distribution with mean 893 dolls andstandard deviation 182 dolls.The company needs to sell 600 to 650 Fresh Dolls per day to break even; anynumbers greater than that represent a profit. Based on the distributionabove, what is the probability that the number of Fresh Dolls sold per day willbe between 600 and 650?

Answered: Image /qna-images/answer/518594c2-c1c5-4a13-85b5-ff9c5a6cdef2.jpg

Answered: Dr. Lisa Williams is the founder of…

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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The SAT is an exam that is used by many universities for admission. Suppose that the scores on the SAT mathematics exam have a normal distribution with mean 500 and standard deviation of 50. The mathematics department identified students scoring in the top 4% of the SAT mathematics exam for recruitment. What is the cutoff score for recruitment by the mathematics department?
York Manufacturing Inc. offers dental insurance to its employees. A recent study by the human resource director shows the annual cost per employee per year followed the normal distribution, with a mean of 1234 dollars and a standard deviation of 321 dollars. What was the minimum cost for the 8 percent of employees that incurred the highest dental expense?
In a small company, the median salary is significantly lower than the mean salary. What does this indicate about the salary distribution in the company? What might be some possible reasons for this pattern?
Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean of 260 mg and a standard deviation of 48 mg. In a random sample of 600 adults, how many consume at least 320 mg of caffeine daily?
The average wage for bank managers in a certain city is $91,900 per hour with a standard deviation of $24,300. What should be the hourly wage for an administrator if he/she wishes to earn less than 25% of all employees?
A report about how American college students manage their finances includes data from a survey of college students. Each person in a representative sample of 793 college students was asked if they had one or more credit cards and if so, whether they paid their balance in full each month. There were 500 who paid in full each month. For this sample of 500 students, the sample mean credit card balance was reported to be $825. The sample standard deviation of the credit card balances for these 500 students was not reported, but for purposes of this exercise, suppose that it was $205. Is there convincing evidence that college students who pay their credit card balance in full each month have a mean balance that is lower than $907, the value reported for all college students with credit cards? Carry out a hypothesis test using a significance level of 0.01. State the appropriate null and alternative hypotheses. H0: ? = 907 Ha: ? < 907 H0: ? = 907 Ha: ? > 907 H0: ? < 907…
In a certain country the heights of adult men are normally distributed with a mean of 67.2 inches and a standard deviation of 2.3 inches. The country's military requires that men have heights between 64 inches and 75 inches. Determine what percentage of this country's men are eligible for the military based on height.
According to the Department of Education the mean number of hours college students spend studying each week follows a normal distribution with a mean of 20 hours and a standard deviation of 9 hours. What ‘hours of study’ represent the 90th percentile? What ‘hours of study’ represent the 15th percentile?
If a set of sample measurements has a mean of 100, a normal distribution, a standard deviation of 2, and control limits of 94 and 106, what percentage of the samples are expected to be between 94 and 106? Explain your answer.
The admission committee of AUCA passes 33% of those who took the exam. If the scores follow a normal distribution with a mean of 85 and a standard deviation of 9, what is the passing score?

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