Note: Solve the following problems. Show all solutions. Round off final answers to 3 decimal places.Question # 5.The heights of men in Saudi Arabia are presumed to be normally distributed. You measure the heights of 150randomly chosen Saudi men, and sample mean is 167 cm and population standard deviation is 7.5 cm. What is a95% confidence interval for the mean height of Saudi men?

Given that Sample size n =150 Sample mean=167 Population standard deviation =7.5

Answered: Note: Solve the following problems.…

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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Solve the following. Show your complete solution. The in-city gasoline mileage per gallon was computed for two economy automobiles, each for 40 tanks of gasoline. The mean and standard deviation of the mile per gallon readings were given in the following table. Find a 90% confidence interval for the difference in mean miles per gallon for the two automobiles. Interpret your result.
Consider the data from the Anthropology 105 class. The mean for women is 64.33 in and the standard deviation is 2.64 in. The average height of men in the US is approximately 5ft 10in. What proportion of women represented here are shorter than the average man?
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Please the answer
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a researcher wishes to develop an interval estimate for response scores on user surveys. She's not sure about the standard deviation, but in previous years the scores have ranged from 25 to 86. How large a sample should she draw if she wants to construct a 95% confidence interval level that will be within 3 points of the population mean score?
Solve the following problem. Show your complete workings. The mean weight of a sample of 100 new born babies is 2.5 kg with standard deviation of 0.3. Find a 90%, 95%, and 99%, confidence interval of the population mean weight of new bon babies. What can you conclude about the relationship of the confidence level with the resulting confidence interval?
Given the following information: My confidence intervals: 90% confidence interval = (2.33, 2.56), and 99% confidence interval = (2.26, 2.63) My peer's confidence intervals: 90% confidence interval at ( 2.37 , 2.61 ) and 99% confidence interval at ( 2.31 , 2.67). How do their confidence intervals compare with yours? If the population standard deviation is unknown and the sample size is not sufficiently large, would you still use the Normal distribution to calculate these confidence intervals, or would you choose another distribution? If the latter, which distribution would you choose?
QUESTION IS IN IMAGE
You measure the weights of 41 textbooks and find they have a mean weight of 77 ounces. The standard deviation for weights of all textbooks is 5.1 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight. Give your answers as decimals, to two places

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