For parts (b), (c) use the correct sign for the t-value and test statistic. X (b) What is the critical t-value? (c) What is the test statistic? (d) Is the null hypothesis rejected? Is the alternative hypothesis supported? O Fail to reject Ho and support H1 O Fail to reject Ho and fail to support H1 O Reject Ho and support H1 O Reject Ho and fail to support H1 (e) Select the correct conclusion. O At a 0.060 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. O At a 0.060 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. O Yes, the company should start the advertising campaign as we prove H1.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 313 and the standard deviation is 40. Suppose that the distribution of number of Facebook friends is symmetric and approximately bell-shaped. Use a 0.060 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