Is there a difference in the pretest and posttest scores of nursing students in Biostatistics? (pretest scores-scores in a 100-item test before review sessions; posttest scores scores in a 100-item test after review sessions) Pre-test Post-test 61 45 56 56 40 89 80 77 67 83 60 70 34 52 60 89 23 92 70 94 65 87 55 89 78 67 94 80 90 56 60 80
Is there a difference in the pretest and posttest scores of nursing students in Biostatistics? (pretest scores-scores in a 100-item test before review sessions; posttest scores scores in a 100-item test after review sessions) Pre-test Post-test 61 45 56 56 40 89 80 77 67 83 60 70 34 52 60 89 23 92 70 94 65 87 55 89 78 67 94 80 90 56 60 80
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 2AGP
Related questions
Question
Solve using following 7 steps/format provided in picture. Required to do the 7 steps provided in pic. Write readable thanks.
Transcribed Image Text:Solution
1.
Ho: The average life span today is not greater than 72 years.
Ha: The average life span today is greater than 72 years.
0.05
2.
3. t-test (one-tailed)
4. df=n-1
df=100-1=99
t₁ = 1.66 Tabular value
5. Computation using the formula for sample mean compared with population mean
tc =
Substitute the given values in the formula
tc
(x-μ)√n
S
=
F = 69
= 72
μ
n = 100
S = 8.9
HOW
(69-72)√/100
8.9
tc = -3.37
6. Decision: Since t computed value of -3.37 is less than tabular value of 1.66.
Therefore, we reject our null hypothesis (Ho).
7. Formulate conclusion: The average life span today is greater than 72 years.
Transcribed Image Text:Is there a difference in the pretest and posttest scores of nursing students in
Biostatistics? (pretest scores-scores in a 100-item test before review sessions;
posttest scores = scores in a 100-item test after review sessions)
Pre-test
Post-test
61
45
56
56
40
89
80
77
67
83
60
70
34
52
60
89
23
92
70
94
65
87
55
89
78
67
94
80
90
56
60
80
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