Question

A community psychologist selects a sample of 16 local police officers to test whether their physical endurance is better than the median score of 74. She measures their physical endurance on a 100-point physical endurance rating scale.

Performance Scores | |||
---|---|---|---|

65 | 82 | 79 | 91 |

92 | 85 | 94 | 96 |

72 | 61 | 81 | 88 |

56 | 80 | 97 | 87 |

Based on the data given above, compute the one-sample sign test
at a 0.05 level of significance.

*x* =

Answer #1

A community psychologist selects a sample of 16 local police
officers to test whether their physical endurance is better than
the median score of 72. She measures their physical endurance on a
100-point physical endurance rating scale.
Performance Scores 79 56 86 87 75 83 89 92 95 90 85 73 76 70 52
64 Based on the data given above, compute the one-sample sign test
at a 0.05 level of significance.
x = 0.05
State whether to retain or...

Student Grades
Student
Test
Grade
1
76
62
2
84
90
3
79
68
4
88
84
5
76
58
6
66
79
7
75
73
8
94
93
9
66
65
10
92
86
11
80
53
12
87
83
13
86
49
14
63
72
15
92
87
16
75
89
17
69
81
18
92
94
19
79
78
20
60
71
21
68
84
22
71
74
23
61
74
24
68
54
25
76
97...

It is known that in certain district the police officers have a
mean physical fitness rating of 73 on a 100- point physical
endurance rating scale and the standard deviation of 8. A new
police chief wants to find out if in his district the police
officers have a larger mean physical fitness rating. Therefore, he
selects a random sample of 69 local police officers and finds that
the mean is 74. Was he right?(show work: NULL and ALTERNATIVE
HYPOTHESIS;...

Using the accompanying Student Grades data, construct a scatter
chart for midterm versus final exam grades and add a linear
trendline. What is the model? If a student scores 7878 on the
midterm, what would you predict her grade on the final exam to
be?
Student
Midterm
Final Exam
1
75
64
2
85
91
3
80
68
4
88
83
5
76
60
6
67
80
7
78
74
8
95
94
9
67
61
10
93
87
11...

Since we are attempting to examine the behavior of a class of
students, the behavior of an individual (as we calculated in
objective 1) is really of little concern to us. Assuming that there
are 30 students enrolled for a typical class, use the central limit
theorem to calculate the following:
• What would be the shape of the
distribution of the average class grade of these 30 students?
• What would be the average class
average of...

Refer to the accompanying data set and construct a 95%
confidence interval estimate of the mean pulse rate of adult
females; then do the same for adult males. Compare the results.
Males Females
81
82
72
94
52
57
59
66
51
54
62
80
52
77
74
85
51
89
62
57
73
35
61
64
62
87
80
74
80
79
63
62
63
67
97
76
43
60
85
65
72
86
66
85
73
69
72 ...

Below represent scores on an exam, each entry one score for one
student
40
99
59
98
63
63
64
65
67
35
67
67
68
70
71
71
71
46
72
72
60
73
74
74
74
75
97
75
62
76
76
76
76
76
77
57
77
98
77
63
78
78
78
79
79
80
80
80
80
80
81
81
92
81
93
82
82
83
83
83
83
83
83
83
84
84
84...

Daughter's Performance on a Stanardized Math
Test
Mother's Performance on a Stanardized Math
Test
Father's Performance on a Stanardized Math
Test
84
90
72
65
70
85
91
86
81
75
82
83
81
84
84
79
93
72
83
72
70
92
90
88
61
74
68
73
60
82
85
83
72
90
93
94
54
64
69
70
78
62
Daughter -Mother Correlation:
Instructions: Indicate the correlation between
daughters and mothers' scores on the standardized math test...

Question 9-15 are based on the random
sample below which is obtained to test the following hypothesis
about the population mean. Test the hypothesis that the mean is
less than 80.
80
100
81
93
80
57
98
90
71
56
58
78
59
55
55
77
72
78
56
94
98
59
93
86
89
62
60
66
59
71
96
97
94
69
64
77
87
77
64
90
90
95
98
99
56
69
72
81
95...

Test score of 40 students are listed below. Find the percentile for
the test score of 66.
30 35 43 44 47 48 54 55 56 57
59 62 63 65 66 68 69 69 71 72
72 73 74 76 77 77 78 79 80 81
81 82 83 85 89 92 93 94 97 98

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