Problem 3 You want to determine if introducing a video in the waiting area will
ID: 3356650 • Letter: P
Question
Problem 3
You want to determine if introducing a video in the waiting area will help relax patients. This study has taken place over 2 days. In the first day, Group 1 (the control group) will experience the waiting room as is (monitor off). On the second day, Group 2 will have a classic movie playing. The nurse will anonymously copy their pulse rate and record the data.
You have conducted the t test and obtained the following results:
Pulse
Levene’s statistics
Df1
Df2
Sig
0.405
1
70
0.526
Pulse
N
Mean
SD
Control
35
99.83
8.542
Classic movie
37
95.68
9.357
Total
72
97.69
9.149
Sum of square
df
Mean squares
F
sig
Between groups
310.198
1
310.198
3.855
0.165
Within groups
5633.080
70
80.473
Total
5943.278
71
Write an abstract and respond the following questions:
Levene’s statistics
Df1
Df2
Sig
0.405
1
70
0.526
Explanation / Answer
a) We are studying the effect of video play on stress of paitents. The variable used to do this study is the pulse rate of paitents. So the variable under study is the pulse rate of paitents which is a continuous variable.
b) The hypotheses under test is:
Null Hypotheses : H0: meu1 = meu2 v/s alternative hypotheses H1: meu1 not equal to meu 2
where meu1 and meu2 are the population mean pulse rate of paitents watching video and not watching video respectively.
c) There are 2 checks to make primarily before performing a t-test:
1. The data sets look like normal - a bell shaped curve - this check was done
2. the variances of the 2 population considered have equal variances - to check this we perform the Levene's test whose Null hypothese is the variances are equal. Here the p-value is 0.526 >> 0.05 (the significant level).So we accept the Null hypotheses that there is no difference in variances.
Hence we have done all suitable pre-t-test checks
d) The p-value of the t-test is 0.165 > 0.05. So we cannot reject the Null hypotheses that there is no difference between pulse rates of the 2 groups. So the data shows no indication that introduction of video streaming will hel paitents relax as far as pulse rate is concerned.
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