A community health plan wishes to estimate the mean number of visits per plan participant in a year. Howlarge a random sample of participants' records should be selected in order to estimate u to within 2 visitswith 95 % confidence? A similar study suggests that the standard deviation of the number of visits perperson is approximately 6.3 .

Given that Margin of Error, E = 2 Population SD = 6.3 Level of confidence = 0.95 The critical value…

Answered: A community health plan wishes to…

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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Small newborn seal pups have a lower chance of survival. Suppose the length of pups was found to follow a Normal distribution with a mean of 29.5 inches and a standard deviation of 1.2 inches. What percentage of seal pups are between 29.5 and 32 inches?
Response time is an important statistic for measuring the effectiveness of a fire department, and is measured as the difference between the time a fire station receives a call and the time the first piece of fire equipment leaves the station. The response times for fire departments in a large city are found to have an approximately Normal distribution, with a mean of 4.5 minutes and a standard deviation of 1.2 minutes. What percentage of fire station response times are under 3 minutes? Find the z-table here. https://r03.core.learn.edgenuity.com/contentviewers/Emissary/OpenEmissaryLink/?a=http%3A%2F%2Fmedia.edgenuity.com%2Fcontentengine%2Fcommon%2F%2Fpassages%2F3112%2F1-3112-common-docs%2F3112-z-table.html&t=111000000000&l=&s=f2b2af05-7f11-ec11-8255-ef70046ba7f2 6.68% 10.56% 89.44% 93.32%
.A study of 100 patients with back pain reported that the mean duration of pain was 12 months. It is known that the standard deviation of duration of back pain is 6.8 months. Assuming that the duration of this problem is normally distributed in the population; determine a 95% confidence interval for the mean duration of back pain in the population.
A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for a random sample of 1088 people age 15 or older, the mean amount of time spent eating or drinking per day is 1.74 hours with a standard deviation of 0.54 hour. Determine and interpret a 95% confidence interval for the mean amount of time Americans age 15 or older spend eating and drinking each day.
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 amount of money raised by Clayton State teams for the Statistics Games is normally distributed, with a mean of $360 and a standard deviation of $15. Using the Empirical Rule, approximately what proportion of teams raise more than $375?
An article in the San Jose Mercury News stated that students in the California state universitysystem take 4.25 years, on average, to finish their undergraduate degrees. Suppose you believe that the mean time is longer. You conduct a survey of 64 students and obtain a sample mean of 4.5 with a sample standard deviation of 1.5. Do the data support your claim at the 1% level?
The Social Insight Test evaluates how accurately the subject appraises other people. From 500 people, scores were found to be normally distributed with a mean of 28 and a standard deviation of 6. About how many people got a score below 23?
An analyst found that the average amount of money in bank accounts at his/her bank is $2,000 with a standard deviation of $150. What would be the variance?
Entrance exam scores at Cititon University are normally distributed with a mean of 552 and a standard deviation of 29. If scholarships are awarded to the top 10% of scores, what is the minimum score needed to guarantee a scholarship?
According to one study, the average hours of sleep on a weeknight for men was 6.9 hours with a standard deviation of 1.5 hours. These hours are normally distributed. c. Find the proportion of men who sleep between 6-8 hours per night. d. Find the number of hours that represents the 90th percentile.

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