2. The following are the IQ test scores of 31 randomly selected business students in a certain university. 113 99 104 89 102 91 114 114 103 105 106 108 130 120 131 110 127 118 119 87 73 111 103 74 112...

2. The following are the IQ test scores of 31 randomly selected business students in a certain university.

113      99        104      89        102      91        114      114      103      105   106

108      130      120      131      110      127      118      119      87        73

111      103      74        112      107      103      98        96        112      113

Estimate the mean IQ score for all business students using the following:

a. 99% confidence interval

b. 95% confidence interval