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American Military University *

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302

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Statistics

Date

Apr 3, 2024

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jpeg

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1

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| Week 6 Knowledge Check Homework Practice Questions 1 - 1 Question 4 1/ 1 point 3 A high school is running a campaign against the over-use of technology in teens. The committee running the campaign decides to look at the difference in social media usage between teens and adults. They take a random sample of 200 teens in their city (Group 1) and find that 85% of them use social media, and then take another random sample of 180 adults in their city (Group 2) and find that 55% of them use social media. Find a 90% confidence interval for the difference in proportions. Enter the confidence interval - round to 4 decimal places. 1202262 "% (50 %)¥<p1 ='P2 S 0.3738 V(50 %) e e e e w Hide question 4 feedback Z-Critical Value =NORM.S.INV(.95) = 1.645 LL = (.85-.55) - 1.645" 8515 55+ 45 20077 # & £150 UL = (.85-.55) + 1.645" .85 % .15 s .55 * .45 200 180
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