Week 5 (5-6)

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School

American Military University *

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Course

302

Subject

Statistics

Date

Feb 20, 2024

Type

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Pages

Uploaded by Philly040404

< Back to Content @ chatceT @ Week 5 Knowledge Check Homework Practice Questions Week 5 Knowledge Check Homework Practice Questions Question 5 1/ 1 point The population standard deviation for the height of college basketball players is 3 inches. If we want to estimate a 99% confidence interval for the population mean height of these players with a 0.5 margin of error, how many randomly selected players must be surveyed? (Round up your answer to nearest whole number) Answer: ___ 239 v w Hide question 5 feedback Z-Critical Value = NORM.SINV(.995) = 2.575 = SD? x Z2 ME? i 32 % 2.5752 52 Question 6 1/ 1 point Suppose a marketing company wants to determine the current proportion of customers who click on ads on their smartphones. It was estimated that the current proportion of customers who click on ads on their smartphones is 0.68. How many customers should the company survey in order to be 97% confident that the margin of error is 0.29 for the confidence interval of true proportion of customers who click on ads on their smartphones? Answer: (Round up your answer to nearest whole number) ¥ Hide question 6 feedback Z-Critical Value = NORM.S.INV(.985) = 2.17009 pxqx Z? ME? .68 * .32 % 2.170092 .292 Question 7 0/ 1 point Select the correct answer for the blank: If everything else stays the same, the required sample size ____ as the confidence level decreases to reach the same margin of error. Answer: w (=) Increases

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