As part of an overall evaluation of training methods, an experiment was conducted to determine the average exercise capacity of healthy male army inductees. To do this, each male in a random sample of 35 healthy army inductees exercised on a bicycle ergometer (a device for measuring work done by the muscles) under a fixed workload until he tired. Blood pressure, pulse rates, and other indicators were carefully monitored to ensure that no one’s health was in danger. The exercise capacities (mean time, in minutes) for the 35 inductees are listed in the data 1. The original question asks for a 95% confidence interval, but I know how to do that. my question is, how do you decide what distribution to use? We do not know the population standard deviation, so I would say t, but isn't one of the assumptions associated with t distribution that the sample be normally distributed? these data aren't normal (by Anderson darling test and qq plot) 2. What are the assumptions of a t distribution? of a Z Distribution? Which one of these would you use to create a 95% CI? Use the following data: 'capacity' 23 28 35 42 21 19 14 25 45 49 36 44 29 23 27 12 15 17 29 39 41 46 51 18 44 43 36 33 14 18 19 25 47 48 13
As part of an overall evaluation of training methods, an experiment was conducted to determine the average exercise capacity of healthy male army inductees. To do this, each male in a random sample of 35 healthy army inductees exercised on a bicycle ergometer (a device for measuring work done by the muscles) under a fixed workload until he tired. Blood pressure, pulse rates, and other indicators were carefully monitored to ensure that no one’s health was in danger. The exercise capacities (mean time, in minutes) for the 35 inductees are listed in the data
1. The original question asks for a 95% confidence interval, but I know how to do that. my question is, how do you decide what distribution to use? We do not know the population standard deviation, so I would say t, but isn't one of the assumptions associated with t distribution that the sample be
2. What are the assumptions of a t distribution? of a Z Distribution? Which one of these would you use to create a 95% CI?
Use the following data:
'capacity'
23
28
35
42
21
19
14
25
45
49
36
44
29
23
27
12
15
17
29
39
41
46
51
18
44
43
36
33
14
18
19
25
47
48
13
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