-A researcher wanted to compare the pulse rates of identical twins to see whether there was any difference. Eight sets o

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-A researcher wanted to compare the pulse rates of identical twins to see whether there was any difference. Eight sets of twins were randomly selected. The rates are given in the table as number of beats per minute. Find the 99% confidence interval for the difference of the two.
Twin A
86
93
77
80
88
90
84
92
Twin B
81
95
78
80
85
94
79
86
A )-3.1 < μ1 - μ2 < 6.1 B) 2.9 < μ1 - μ2 < 5.9 c) 3.1 < μ1 - μ2 < 6.1