In Chapter 8 we examined confidence intervals. Recall that to construct a confidence interval for the mean when the population standard deviation is unknown, the population must follow the normal probability distribution. To test this condition, the following data show a random sample of weekly visits by patients to Dr. Gregg’s chiropractic office. The data can also be found in the Excel file Dr. Gregg’s office.xlsx.

a. Using α = 0.05, perform a chisquare test to determine if the number of patient visits per week follows the normal probability distribution. = 100.6 and s = 18.7.

b. Determine the p_value using Excel and interpret its meaning.

110 117 78 114 131 67 105 105 938 4 93 91 96 109 114 127 116 112 82 92 100 98 67 100 129 107 105 72 65 131 78 103 81