9.1 Testing the Difference between two Proportions. it's a 1 part step to the question of answering the 1 questions, the question of help me solve this shows a step by step on how to do it all 1 part, I'm going to attach a photo of the question right below it. I also have a view an example to help on solving the question I will attach it below as well.

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2:05 AM Tue May 21 . . . 53% AA mylab. pearson.com C + L.Louie_Math 119-5.... P Pearson Sign In Course Hero x P Do Homework - Ho... Course Hero Homework Help - Q... Course Hero Math 119-571 Spring 2024 aby leonard 05/20/24 5:06 PM =Homework: Homework 9.1 Question 5, 9.1.23-T HW Score: 31.46%, 2.2 of 7 points Save O Points: 0 of 1 Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who Question list K own smartphones. Assume that you want 95% confidence that your error is no more than 0.035. i Click the icon to view the discussion of sample size. Question 1 The sample should include men and women. Question 2 (Type whole numbers.) Question 3 Question 4 O Question 5 O Question 6 O Question 7 Help me solve this View an example Get more help Clear all Check answer2:09AM Tue May 21 & mylab.pearson.com 8 @ Do Homework - Ho... Math 119-571 Spring 2024 aby leonard 05/20/245:08 PM (2) = ) i = Homework: Homework 9.1 Question 5, 9.1.23-T ore: 31.46%, 2.2 of 7 points o) @ View an example | All parts showing X iroportions of men and women who Question list Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who own smartphones. Assume that you want 95% confidence that your error is no more than 0.07. 0 Click the icon to view the discussion of sample size. F @ Question 1 % Question 2 A confidence interval is a range of values used to estimate the true value of a population parameter. The confidence level is the probability 1 - that the confidence interval actually does contain the population parameter, assuming that the estimation process is repeated a large number of times. % Question 3 From the discussion of sample size, the sample size needed to estimate the difference between two population proportions to within a margin of error E with a confidence level of 1 - a is given by the formula below. 2 Zo/2 /2 Question 4 n= 2E2 Identify the desired maximum margin of error, E. O Question 5 E=0.07 Identify the confidence level for the desired confidence interval estimate. O Question 6 95% Identify the value of that corresponds to a confidence level of 95%. O Question 7 a=0.05 A critical value is the number on the borderline separating sample statistics that are significantly high or low from those that are not significant. The o number z,/7 is a critical value that is a z score with the property that it is at the border that separates an area of 2 in the right tail of the standard normal distribution. Calculate 5, the desired area in the right tail of the standard normal distribution. Nl R Help me solve this View an example Get more help ("Cleara 2:09AM Tue May 21 & mylab.pearson.com 8 @ Do Homework - Ho... Math 119-571 Spring 2024 = Homework: Homework 9.1 Question 5, 9.1 View an example | Al parts showing X iroportions of men and women who Question list Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who own smartphones. Assume that you want 95% confidence that your error is no more than 0.07. @ Question 1 0 Click the icon to view the discussion of sample size. P 7z Question 2 o number z, /7 is a critical value that is a z score with the property that it is at the border that separates an area of 2 in the right tail of the standard normal distribution. 72 Question 3 o Calculate E' the desired area in the right tail of the standard normal distribution. % Question 4 o _ 0.05 2 2 = 0.025 uestion 5 O & Therefore, the cumulative area to the left of zy 5 is 0.975. While either a standard normal distribution table or technology could be used to find the value of z that has a cumulative area to the left of 0.975, for the O Question 6 purpose of this solution, technology will be used. Find the value z,2, rounding to two decimal places. Zg/2 =1.96 O Question 7 Recall that E =0.07. Substitute these values into the expression in the accompanying discussion of sample size and find n, rounding up to the nearest whole number. 2 Za/2 ns= 2E2 _ (196 2(0.07)? = 392 The sample should include 392 men and 392 women. Help me solve this View an example Get more help ("Cleara