O a. a smaller sample size and a smaller confidence interval O b. a larger sample size and a smaller confidence interval C. a smaller sample size and a larger confidence interval O d. a larger sample size and a larger confidence interval All else constant, which of the following would not have an effect on the width of a confidence interval? O a. an increased sample mean O b. an increased sample size O C. an increased percentage of confidence O d. an increased sample variance Which of the following is true about a 95% confidence interval of the mean: Time left 0:41:18 9 a. 95 out of 100 confidence intervals will contain . O b. 95 out of 100 sample means will fall within the limits of the confidence interval. O C. 95% of the time u will fall within the limits of the confidence interval. O d. There is a 0.05 probability that u falls within the limits of the confidence interval. Clear my choice In confidence interval estimation, what are we confident of? a. That the interval includes the sample mean O b. That the interval includes u O c. That the wider the interval the more likely it is to include u O d. That the interval will include 95% of all sample means drawn Clear my choice