a) Determine the standard deviation of the reduction in Blood pressure for subjects with no exercise program. b) Determine the standard deviation of the reduction in Blood pressure for subjects on a daily exercise program . c) Determine the variance in the reduction in Blood pressure for subjects with noexercise program.

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a) Determine the standard deviation of the reduction in Blood pressure for subjects with no exercise program.

b) Determine the standard deviation of the reduction in Blood pressure for subjects on a daily exercise program .

c) Determine the variance in the reduction in Blood pressure for subjects with noexercise program.

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In a study to investigate the effect of regular physical exercise on the reduction of
high blood pressure in males aged 60-65, the researchers selected at random a
sample of n, = 12 males suffering from high blood pressure in the given age group
and for a two-year period placed the subjects on a daily physical exercise program.
A second sample of n, = 12 males suffering from high blood pressure in the given
age group was selected and again for the two-year period this group of subjects
were placed on a physical exercise program for which they were required to
perform only once a week. Finally a third sample of n, =12 males suffering from
high blood pressure in the given age group was selected. No exercise program
was required for individuals in sample three. At the end of the two-year period the
reduction in blood pressure was measured for each of the subjects in the study and
is presented in the table on the next page.
Table V.1: Reduction in Blood pressure for three groups of
males aged 60-65 initially suffering from high blood pressure.
Exercise
Daily
Weekly
No
21.2
15.7
5.6
15.6
18.5
-5.7
4.5
29.0
-14.8
32.0
17.4
4.9
20.4
6.7
8.6
12.2
11.4
18.6
11.2
4.1
-7.9
30.9
23.5
15.2
10.4
15.1
-2.3
23.7
5.8
-8.9
22.8
25.7
-1.2
11.2
19.7
8.6
Er 216.1
192.6
20.7
Er? 4697.43
3786.64
1180.17
Transcribed Image Text:In a study to investigate the effect of regular physical exercise on the reduction of high blood pressure in males aged 60-65, the researchers selected at random a sample of n, = 12 males suffering from high blood pressure in the given age group and for a two-year period placed the subjects on a daily physical exercise program. A second sample of n, = 12 males suffering from high blood pressure in the given age group was selected and again for the two-year period this group of subjects were placed on a physical exercise program for which they were required to perform only once a week. Finally a third sample of n, =12 males suffering from high blood pressure in the given age group was selected. No exercise program was required for individuals in sample three. At the end of the two-year period the reduction in blood pressure was measured for each of the subjects in the study and is presented in the table on the next page. Table V.1: Reduction in Blood pressure for three groups of males aged 60-65 initially suffering from high blood pressure. Exercise Daily Weekly No 21.2 15.7 5.6 15.6 18.5 -5.7 4.5 29.0 -14.8 32.0 17.4 4.9 20.4 6.7 8.6 12.2 11.4 18.6 11.2 4.1 -7.9 30.9 23.5 15.2 10.4 15.1 -2.3 23.7 5.8 -8.9 22.8 25.7 -1.2 11.2 19.7 8.6 Er 216.1 192.6 20.7 Er? 4697.43 3786.64 1180.17
а) 8.56
b) 10.20
с) 11.41
d) 12.05
e) 12.55
f) 15.40
g) 24.90
h) 27.50
i) 73.26
j) 104.04
Transcribed Image Text:а) 8.56 b) 10.20 с) 11.41 d) 12.05 e) 12.55 f) 15.40 g) 24.90 h) 27.50 i) 73.26 j) 104.04
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