Question

How do you find the difference of mean for a data set????

Here are my numbers

drinking soda (15 min after)
91
69
82
66
76
66
92
72
89
78
74
99
69
86
58
80
66
60
76
78
82
77
80
88
74
68
92
67
96
75
75
94
75
70
74
80
96
67
80
76
80
82
64
80

Answer 1

To find difference of means, we should have two groups and we have to find the mean of the first group by adding all the observations in the group and divided by total number of observations and similarly, after that we need to find the mean of second group. Once we have the mean of both the groups, we can find the difference in means by subtracting the means of individual groups.