QUESTION 28In which of the following situations we can not construct a confidence interval for the population proportion?n=130, x=60n=280, x=120n=75, x=71On=520, x=85QUESTION 29Ali is interested in estimating the mean amount spent per day in a shopping mall based on 16 customers. It is knownthat the amount spent per day in a shopping mall is normally distributed. Find the corresponding critical value forconstructing a 93% confidence interval. Round your answer to three decimal places.QUESTION 30Find the confidence level related to the critical value f/2= -1.81 where the sample size n =9.91.2%089.2%Ⓒ90.3%89.8%QUESTION 31The price of Apple iPad 2021 is recorded at a random sample of 64 electronics stores in UAE. The resulting 99% z-based confidence interval for the mean price of Apple iPad 2021 was (1579 Dhs, 1802 Dhs). Find the margin of error(E) of the 99% confidence interval. Round your answer to one decimal place.

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Answered: QUESTION 28 In which of the following…

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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Question 16 A poll asked 1034 American adults if they believe there was a conspiracy in the assassination of President Kennedy, and found that 611 believe there was a conspiracy. Estimate the proportion of Americans who believe in this conspiracy using a 99% confidence interval. Round to three decimal places. With > % confidence, we can conclude that the true proportion of Americans who and believe in this conspiracy is between
Question 3
Question 81 parts D and E
question 21 You are interested in constructing a 90% confidence interval for the proportion of all caterpillars that eventually become butterflies. Of the 412 randomly selected caterpillars observed, 53 lived to become butterflies. Round answers to 4 decimal places where possible. a. With 90% confidence the proportion of all caterpillars that lived to become a butterfly is between ? and .?
QUESTION 16 In 2005, Health Canada claimed that 16.6% of Canadian adults are obese. A researcher wanted to check whether this percentage has increased in 2009. He randomly selected 160 Canadian adults and found 30 of them are obese. He wants to develop a 92% confidence interval for the obese percentage in 2009. Write down the critical value
Question 5: The age when smokers first start from previous studies is normally distributed with a mean of 13 years old with a population standard deviation of 1.5 years old. A survey of smokers of this generation was done to estimate if the mean age has changed. The sample of 34 smokers found that their mean starting age was 13.2 years old. Find the 99% confidence interval of the mean. ______ < _______ < _______
QUESTION 9 A random sample of 500 ZU students are surveyed to determine if they own a tablet. It was found that a 95% confidence interval of the true population proportion of ZU students who own tablets is (0.406, 0.494). Find the point estimator of the true population proportion of ZU students who own tablets. Round your answer to two decimal places.
QUESTION 9 A sample of 25 part-time workers had an average hourly income of $15.0 with a sample standard error of $2.00. a) What is the interval for average hourly wage of all part-time workers at the 95% confidence? (round interval to the second decimal For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).
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QUESTION 25 The daily sales of Hi-White toothpaste are believed to be approximately normally distributed. For a random sample of 21 days, the standard deviation sales turned out to be 18.19 tubes. Find the crtical value that corresponds to the confidence interval if the margin of error is 7.79. Round your answer to three decimal places.
QUESTION 17 Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. A researcher was interested in comparing the resting pulse rates of people who exercise regularly and the pulse rates of people who do not exercise regularly. She obtained independent simple random samples of 16 people who do not exercise regularly and 12 people who do exercise regularly. The resting pulse rates (in beats per minute) were recorded and the summary statistics are as follows. Do not exercise regularly Exercise regularly x1 = 723 beats/min x2 = 68.1 beats/min %3D s1 = 10.9 beats/min s2 = 8.2 beats/min ni = 16 n2 = 12 Construct a 95% confidence interval for mu1 - mu2, the difference between the mean pulse rate of people who do not exercise regularly and the mean pulse rate of people who…
QUESTION 11 The daily sales of Hi-White toothpaste are believed to be right-skewed. For a random sample of 34 days, the standard deviation sales turned out to be 15.36 tubes. Find the crtical value that corresponds to the confidence interval if the margin of error is 5.88. Round your answer to three decimal places.

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QUESTION 28 In which of the following situations we can not construct a confidence interval for the population proportion? n=130, x=60 On=280, x=120 Ⓒn=75, x=71 On=520, x=85