Melissa and madeline love pepperoni pizza, but sometimes they are disappointed with the small number of pepperonis on their pizza. to investigate, they went to their favorite pizza restaurant at 10 random times during the week and ordered a large pepperoni pizza. here are the number of pepperonis on each pizza. the 95% confidence interval for the mean number of pepperonis on a large pizza at this restaurant is (31. 919, 42. 881). to reduce the margin of error, melissa and madeline could increase the sample size or decrease the confidence level. what are the drawbacks to these changes

According to a research study, parents with young children slept 6.4 hours each night last year, on average. a random sample of 18 parents with young children was surveyed and the mean amount of time per night each parent slept was 6.8. this data has a sample standard deviation of 0.9. (assume that the scores are normally distributed.) researchers conduct a one-mean hypothesis at the 5% significance level, to test if the mean amount of time parents with young children sleep per night is greater than the mean amount of time last year. the null and alternative hypotheses are h0: μ=6.4 and ha: μ> 6.4, which is a right-tailed test. the test statistic is determined to be t0=1.89 using the partial t-table below, determine the critical value(s). if there is only one critical value, leave the second answer box blank.