E Question HelpQuA physical therapist wants to detemine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample sizeshould be obtained if he wishes the estimate to be within three percentage points with 99% confidence, assuming thatStWe(a) he uses the estimates of 22.1% male and 19.3% female from a previous year?(b) he does not use any prior estimates?St(Round up to the nearest whole number.)(a) n=Gr(b) n=(Round up to the nearest whole number.)StaमिCheTToMuPu31DisCoEnter your answer in each of the answer boxes.262728P PearsonPrivacy Policy Permissions Co2019 Pearson Education Inc. All rights reserved. I Terms of Use |Copyright

(a)From the given information, 99% confidence estimate of the difference in the true proportions…

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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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A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 3 points with 99% confidence assuming s=17.8 based on earlier studies? Suppose the doctor would be content with 99% confidence. How does the decrease in confidence affect the sample size required? a. A 99% confidence level requires _______ subject. b. 90% confidence level requires ________ subject. c.How does the decrease in confidence affect the sample size required? a.Decreasing the confidence level decreases the sample size needed. b.Decreasing the confidence level increases the sample size needed. c.The sample size is the same for all levels of confidence.
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Refer to the accompanying data set and construct a 95%confidence interval estimate of the mean pulse rate of adult females; then do the same for adult males. Compare the results. . 1. Construct a 95%confidence interval of the mean pulse rate for adult females. ____ bpm<μ<____ bpm (Round to one decimal place as needed.) 2. Construct a 95% confidence interval of the mean pulse rate for adult males. _____ bpm<μ<____ bpm (Round to one decimal place as needed.)
6.Statistics Quiz
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Country of Origin N Mean Std. Deviation China 50 22.5 9.75 America 30 33.15 11.6 What is the SE mean for the sales from china? Calculate a 95% confidence interval for the mean sales amount made in America. Use the statistical tables when necessary and show all workings
Researchers studied the mean egg length (in millimeters) for a bird population. After taking a random sample of eggs, they obtained a 95% confidence interval of (45,60). What is the value of the margin of error? Choose the correct answer below. A. 15 mm B. 52.5 mm O c. 7.5 mm O D. 1.96
The data below give the wait time in seconds for a random sample of callers when calling a local pizza restaurant. {66, 37, 4, 47, 12, 16, 62, 12, 21, 25, 49, 3} a. What is the point estimate for the average wait time for callers? b. Verify conditions for using this sample to predict population mean of wait times. Estimate the mean wait time for all callers to this restaurant, with 90% confidence. Write your answer as a sentence. C. d. Estimate the standard deviation of wait times for all callers to this restaurant, with 90% confidence. Write your answer as a sentence. (You do not need to check requirements.)
N You are interested in determining if the pandemic has caused people to become depressed. You randomly sample 20 individuals and administer a 30 item true/false psychological test designed to measure depression. Scores that are greater than 20 indicate significant levels of depression. Use the following descriptive statistics to determine if individuals in your sample are depressed. Mean Std. Deviation Score 8 22.25 2.49 0.025 Use these data to answer the following questions. Chapter 9 is most relevant here. Two-tailed test critical region
PLEASE ELABORATE MORE The data set below shows the amount of trash generated by ten households (in pounds per day). Assume that the population is normally distributed. 3:9 4:6 15:6 10:5 16:0 6:7 12:0 9:2 13:8 16:8 (a) Construct a 95% confidence interval for the mean based on the sample. (b) Construct a 90% confidence interval for the mean. (c) Construct an 80% confidence interval for the mean.
Based on historical data in Oxnard college, we believe that 36% of freshmen do not visit their counselors regularly. For this year, you would like to obtain a new sample to estimate the proportiton of freshmen who do not visit their counselors regularly. You would like to be 90% confident that your estimate is within 1% of the true population proportion. How large of a sample size is required? Do not round mid-calculation.n =

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