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A company wants to promote a new product to college students using social media. According to 2020 data, the average Facebook user has about 300 friends, and Facebook is the most popular social network among college students. The company has decided to start an advertising campaign if they get conclusive evidence that the average number of Facebook friends among college students is over 300. The company randomly selected a sample of 81 Ontario college students. For this sample group, the mean is 310 and the standard deviation is 38. Suppose that the distribution of number of Facebook friends is symmetric and approximately bell-shaped. Use a 0.030 level of significance to test the claim that the average number of Facebook friends among college students is over 300. Based on the result, should the company start the advertising campaign? Round to 3 decimal places where appropriate. (a) State the null and alternative hypotheses, and identify which one is the claim. H1: Select an answer Which one is the claim: CH1 CH0 For parts (b), (c) use the correct sign for the t-value and test statistic. (b) What is the critical t-value? [: (c) What is the test statistic? [: (d) Is the null hypothesis rejected? Is the alternative hypothesis supported? 0 Reject H0 and fail to support H1 C Reject H0 and support H1 O Fail to reject H0 and fail to support H1 0 Fail to reject H0 and support H1 For parts (b), (c) use the correct sign for the t-value and test statistic. (b) What is the critical t-value? [: (c) What is the test statistic? [: (d) Is the null hypothesis rejected? Is the alternative hypothesis supported? A Reject H0 and fail to support H1 A Reject H0 and support H1 A Fail to reject H0 and fail to support H1 A Fail to reject H0 and support H1 (e) Select the correct conclusion. A No, the company should not start the advertising campaign as we prove H0. AAt a 0.030 level of significance, the sample data support the claim that the average number of Facebook friends among college students is over 300. The company should start the advertising campaign. A No, the company should not start the advertising campaign as 300 is less than 310. A At a 0.030 level of significance, there is not sufficient sample evidence that the average number of Facebook friends among college students is over 300. Based on the research, we cannot conclude that the company should start the advertising campaign. A Yes, the company should start the advertising campaign as we prove H1. AYes, the company should start the advertising campaign as 300 is greater than 310
