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0.00560.05260.01560.0256Reference: upper(right) tail problem. PHStat/Two Sample Tests (summarized data)/ Separate-Variance tTest . P-value: T.DIST.RT(t-test statistic, degrees of freedom)Question 81 / 1 pointSuppose Burger King has run a major advertising campaign in the hopes of increasing monthly sales. To investigate the effectiveness of this campaign, Burger King randomly selected seven restaurants and recorded the monthly sales before and after the advertising. The following data represents these sales figures in thousands of dollars.Restaurant1234567After (Year 2012)$127$122$145$156$160$134$108Before ( Year 2011)$107$110$143$168$145$125$98Excel file with table data: 10 Q 8 Burger_King.xlsxIf Population 1 is defined as the year 2012 and Population 2 is defined as the year 2011, and using α0.05, the critical value for this hypothesis test would be ________.= 2.365± 1.771
± 1.4401.943Reference: PHStat/Two sample tests(Unsummarized data)- Paired t TestQuestion 91 / 1 pointThe Centers for Disease Control (CDC) would like to test the hypothesis that the proportion of obese adults in the U.S. has increased this year when compared to last year. A random sample of 120 adults thisyear found that 45 were obese. Last year, a random sample of 150 adults found that 48 were obese. If Population 1 is defined as this year and Population 2 is defined as last year, the correct hypothesis statement for this hypothesis test would beH0: p1 - p2 < 0; H1: p1 - pH0: p1 - p2≥ 0.2≠ 022> 0.2< 0.Question 101 / 1 pointAT&T would like to test the hypothesis that the proportion of 18- to 34-year-old Americans that own a smartphone is less than the proportion of 35- to 49-year-old Americans. A random sample of 200 18- to
34-year-old Americans found that 126 owned a smartphone. A random sample of 175 35- to 49-year-old Americans found that 119 owned a smartphone. If Population 1 is defined as 18- to 34-year-old Americans and Population 2 is defined as 35- to 49-year-old Americans, the 98% confidence interval for the difference in population proportions is ________.