Answered: A nursing school professor is…

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 15PPS

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Question

A nursing school professor is interested in determining how her college students compare to
the national average when it comes to the Final Practicum Exam. The exam has a μ = 100
and σ = 20. There has been no evidence to suggest whether those seniors score better or
worse than the national average and she is curious as to how her class (N=17) compares.
Data
Students Exam Score
1 120
2 100
3 110
4 90
5 130
6 123
7 101
8 115
9 111
10 99
11 105
12 119
13 128
14 109
15 98
16 95
17 102
8. Write the z result in the correct form: _____________________________________________
1. Write the null and alternative hypothesis in statistical
form:
_________________________________
_________________________________
2. Determine the mean for the sample: Statistics
Calculator
3. Apply the z-test formula
Zobt = ___________
4. Is this a one-tailed (directional test) or a two-tailed
(non-directional test)? ______________________
5. What is your alpha level set to? α = ___________
6. Determine the critical value(s) (Zcrit) = ___________
7. Label the critical value(s) and indicate the position of the Zobt on the distribution

B. A physical fitness trainer has several workouts she developed for increasing female upper
body strength. All the workout plans are created based on the average adult women’s bench
press ability. The average adult woman can bench 115 lbs. with a standard deviation of 18
pounds. The trainer has a class of 14 females and does an initial test to see if the women are
representative of the average female population.
Data
Female Class Bench Ability (lbs.)
1 130
2 100
3 99
4 114
5 130
6 97
7 114
8 135
9 128
10 128
11 116
12 141
13 113
14 116
8. Write the z result in the correct form: _____________________________________________
1. Write the null and alternative hypothesis in statistical
form:
_________________________________
_________________________________
2. Determine the mean for the sample:
3. Apply the z-test formula
Zobt = ___________
4. Is this a one-tailed (directional test) or a two-tailed
(non-directional test)? ______________________
5. What is your alpha level set to? α = ___________
6. Determine the critical value(s) (Zcrit) = ___________

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