Using a random sample of 4,000 students, you compute a 95% confidence interval to estimate the mean calories consumed by 8th graders. You decide to compute another 95% confidence interval using a different sample, this time with only 1,000 students. What change would you expect from the first confidence interval to the second? Select one: O a. The confidence interval will be smaller O b. The margin of error will be 2 times as wide C. The margin of error will be 4 times as wide d. The margin of error will decrease which the following measures central tendency cannot be calculated for the observations 5,5 ,1,1,7,7,8,8 Select one: O a. variance b. mode c. mean d. median Consider the following data set 12, 25, 8, 6, 17, 15,5 what is the range select one: Hon Select one: a. 5 b. 15 C. 10 d. 20 21 If the p-value > a in a two-tailed test: ut of Select one: O a. a one-tailed test should be used. b. the null hypothesis Ho should be rejected. c. a should be changed. uestion O d. the null hypothesis Ho should not be rejected