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Partial Question 14 0.63 / 1.25 pts Which of the following is/are true about the Excel function = CONFIDENCE.NORM This function uses the normal distribution (table B.1) This is the appropriate function to use if the sample size is less than 30 This is the appropriate function to use to calculate Cl of a proportion This is the appropriate function to use if the sample size is greater than 30 Partial Question 15 0.42 / 1.25 pts Which of the following is/are true about confidence intervals (choose one or more) knowing the range of a parameter is more accurate than a point estimate confidence interval of the mean = mean +/- a margin of error when we calculate a 95% confidence interval there is statistical significance confidence intervals are abbreviated CI Incorrect Question 16 0 / 1.25 pts When would you use the confidence interval formula for a proportion? (choose one or more) To determine if the groups are significantly different You do not know the standard deviation You have summary information as a percentage or survey sample data Your sample size is under 30