It appears that people who are mildly obese are less active than leaner people. One study looked at the average number ofminutes per day that people spend standing or walking. Among mildly obese people, the mean number of minutes ofdaily activity (standing or walking) is approximately Normally distributed with 371 minutes and standard deviation 69minutes. The mean number of minutes of daily activity for lean people is approximately Normally distributed with 526minutes and standard deviation 106 minutes. A researcher records the minutes of activity for an SRS of 6 mildly obesepeople and an SRS of 6 lean people.(a) What is the probability that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 410minutes? (Enter your answer rounded to four decimal places.)probability: 0.0256Incorrect(b) What is the probability that the mean numberpof minutes of daily activity of the 6 lean people exceeds 410 minutes?(Enter your answer rounded to four decimal places.)probability:0.9936IncorrectQuestion Source: Moore, The Bas

Answered: Image /qna-images/answer/f107001d-2c8a-4809-84a5-7a30a71888ac.jpg

Answered: It appears that people who are mildly…

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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If the weekly grocery expenditure of households in a certain urban market is known to be normally distributed with a mean of $150 and a standard deviation of $30, what proportion of the households spend between $110 and $160 per week on groceries?
Adult Great Basin rattlesnakes have a mean length of 32.5 inches and a standard deviation of 6.6 inches; the length of adult Southern Pacific rattlesnakes is also 32.5 inches on average, but with a standard deviation of 9.9 inches. Both species have lengths that follow a normal distribution. You randomly select one Great Basin rattlesnake and one Southern Pacific rattlesnake. Which is more likely be longer than 35.8 inches? a. The Southern Pacific rattlesnake. b. Not enough information is provided, it depends. O c. Both are equally likely to be more than 35.8 inches long d. The Great Basin rattlesnake.
The average hours of sleep on a weeknight was 6.9 hours with a standard deviation of 1.5 hours. What is the proportion of men who sleep for less than 6 hours per night ?
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?
It has been found that with the standard dosage of a drug, the change in people’s uric acid levelis normally distributed with a mean of 240 and a standard deviation of 60. What proportionof people receiving the standard dosage of this drug experience changes in uric acid levelbetween 210 and 270?
A company has rolled out a new process for sales people to use. They were able to go back into the company records and pull all sales data from before the roll out. Each sales person when they closed a sale had an average contract of $108 with a standard deviation of $12. During the first month after the roll out, a sample of sales showed the average contract was $116. Which statistical test could be used to see if this was a significant increase in contract size?
The incomes of math tutors in a tutoring center of a university are normally distributed with a mean of $1100 and a standard deviation of $150 what percentage of tutors earn less than $900 a month
According to a recent report the battery life for a new line of laptop computers has a mean of 9 hours with a standard deviation of 2.4 hours. If battery life is normally distributed what percentage of new laptops will last between 8 and 11 hours on a single charge?
The hotel room rate in Miami, Florida is normally distributed with a mean of $286 per night. Assume that the standard deviation is unknown. If 19% of the Miami hotel room rates are more than $300 per night, what is the variance?
The mean gas mileage for a hybrid car is 57 miles per gallon. Suppose that the gasoline mileage is approximately normally distributed with a standard deviation of 3.5 miles per gallon. What proportion of hybrids gets over 61 miles per gallon?
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?
Bone mineral density (BMD) is a measure of bone strength. Studies show that BMD declines after age 45. The impact of exercise may increase BMD. A random sample of 59 women between the ages of 41 and 45 with no major health problems were studied. The women were classified into one of two groups based upon their level of exercise activity: walking women and sedentary women. The 39 women who walked regularly had a mean BMD of 5.96 with a standard deviation of 1.22. The 20 women who are sedentary had a mean BMD of 4.41 with a standard deviation of 1.02. Which of the following inference procedures could be used to estimate the difference in the mean BMD for these two types of women

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