Question 6:An experiment concerning the calculation of a confidence interval for the population proportion isrepeated from a previous trial. The sample proportion changed from 0.78 to 0.81 between the first andsecond runs of this experiment, and all other measures stayed the same. How would the width of theresulting confidence interval change?Answer:

Given: Old sample proportion = 0.78 New sample proportion = 0.81

Answered: Question 6: An experiment concerning…

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 # 11: Using the data in question 9 (I just resubmitted to Bartleby), calculate the 95% confidence interval for the mean ACT score based on the t-distribution. 29, 26, 13, 23, 23, 25, 17, 22, 17, 19, 12, 26, 30, 30, 18, 14,12, 26, 17, 18 Choose the following: A. 18.07 to 23.63 B. -∞ to 23.15 C. 18.22 to 23.48 D. -∞ to 23.05
Question 2 Express the confidence interval 24.3 % < p < 41.3 % in the form of p ± ME.
Question 5 A common claim is that garlic lowers cholesterol levels. In a test of the effectiveness of garlic, 45 subjects were treated with doses of raw garlic, and their cholesterol levels were measured before and after the treatment. The changes in their levels of LDL cholesterol (in mg/mL) have a mean of 4.94 mg/mL and a standard deviation of 18.51 mg/mL. Construct a 95% confidence interval for the average net change in LDL cholesterol after the garlic treatment. i. Procedure: Select an answer Select an answer One proportion Z procedure One mean T procedure One mean Z procedure One variance x² procedure ii. Assumptions: (select everything that applies) Simple random sample Sample size is greater than 30 Population standard deviation is unknown Population standard deviation is known The number of positive and negative responses ar Normal population iii. Unknown parameter: Select an answer Select an answer u, population mean o², population variance p, population proportion
Question 1: A confidence interval is calculated after running a two-sample z-test for proportions, yielding the result: [0.01, 0.14]. Determine the margin of error for this interval. Answer:
Question 5, 8.2.34
#20
question 3
question 17

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Question 6: An experiment concerning the calculation of a confidence interval for the populat repeated from a previous trial. The sample proportion changed from 0.78 to 0.81 second runs of this experiment, and all other measures stayed the same. H resulting confidence interval change?