Question

According to the financial reports by Snapchat, the average daily user of Snapchat created 19 messages, or "snaps." per day in Q3 2017 A college student wants to find out in the number of Snapchat messages has changed since 03 2017 and creates a random sample using information from students on her campus for the current semester, with the accompanying results. Complete parts a through c. Click the con to view the daily snaps data Using a 0.01, test the hypothesis that the number of Snapchats sent by the average Snapchat user has not changed since Q3 2017 Determine the null and whernative hypotheses но и Daily Snaps (Type integers or decimals. Do not round) Determine the appropriate crtical value Select the correct choice below and fill in the answer box within your choice (Round to three decimal places as needed) ОА OB 2012 20 33 13 B 17 30 5 21 15 31 9 21 28 23 23 32 2016 Print Done Click to select your answers)

Answer 1

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Aim To test the claim that the average snapchat. tas not changed since 83 2017, users a M = 19 M 719 two tooled test So the critical values s are 7tx/2 7 tool/2 tooos Now we calculate the test statistic te X-Ho slan trol x = 20:15 n S = 2 1 = 1 n-1 AXY ng) N-U tis (6463- 20 x 2015) 8.406 Decisioni Rule: we can reject the Ho ib we have xar IUL> 4/2, 1-1 Result: +2/2, n- n-1 to.005,19 -0.861 2.86. t stat 20015-Y = 0.6118 80406/120 Decisioni Here 0.6118 * 2.861, we can't reject the Ho. The p-value a 0.548.