Question
Ninety minutes are allowed for students to complete the multiple-choice section of a national exam. A random...
Ninety minutes are allowed for students to complete the multiple-choice section of a national exam. A random sample of 28 students selected from the students at a large high school took a practice exam, and the time (in minutes) that it took each student to complete the multiple-choice section was recorded. The times are given below.
|
Time to Complete the Multiple Choice Section |
||||||
|
58 |
76 |
74 |
80 |
88 |
74 |
65 |
|
97 |
66 |
95 |
77 |
63 |
83 |
73 |
|
64 |
71 |
60 |
68 |
70 |
63 |
71 |
|
57 |
75 |
74 |
52 |
71 |
81 |
82 |
Is there evidence at the 5% level of significance that the mean time to complete the multiple-choice sections for students at this school is less than 76 minutes?
Homework Answers
Answer #1
Not the answer you're looking for?
Similar Questions
Below represent scores on an exam, each entry one score for one student 40 99 59...
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...
The following scores on the midterm exam in a math class were recorded. Find IQR. 93...
The following scores on the midterm exam in a math
class were recorded. Find IQR. 93 81 59 69 82 73 61 77 95 84 88 71
85 97 63 72 89 80 60 98 91 62 78 83 76 81 94 66 83 96
Test score of 40 students are listed below. Find the percentile for the test score of...
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
Refer to the accompanying data set and construct a 95% confidence interval estimate of the mean...
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 ...
The test scores of 40 students are listed below. 30 35 43 44 47 48 54...
The test scores of 40 students are listed below.
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
a)
Find the lower and upper quartiles for the data.
b)
Find the interquartile range.
c)
Draw the box-and-whisker diagram for the data.
Question 1: Table 1 shows the number of customers visited by a salesman over an 80-week...
Question 1: Table 1 shows the number of customers visited by a
salesman over an 80-week period. Table 1: Customers Visited Over an
80-Week Period 68 64 75 82 68 60 62 88 76 93 73 79 88 73 60 93 71
59 85 75 61 65 75 87 74 62 95 78 63 72 66 78 82 75 94 77 69 74 68
60 96 78 89 61 75 95 60 79 83 71 79 62 67 97 78...
Use ? to approximate σ. Use a 5% level of significance. Data: 69 62 75 66...
Use ? to approximate σ. Use a 5% level of significance.
Data:
69
62
75
66
68
57
61
84
61
77
62
71
68
69
79
76
87
78
73
89
81
73
64
65
73
69
57
79
78
80
79
81
73
74
84
83
82
85
86
77
72
79
59
64
65
82
64
70
83
89
69
73
84
76
79
81
80
74
77
66
68
77
79
78
77
To test the effectiveness of the use of technology in a statistics course, four different sections...
To test the effectiveness of the use of technology in a
statistics course, four different sections were taught with
different combinations of calculators and computer software, with
final course averages listed below for randomly selected students
from each section. Test the claim that the samples come from
populations that are not all the same.
Calculators only
74 85 91 62
73 87 66 80
Calculators and Computers
78 89 82 64
77 91 73 85
Computers only
82 87 60...
A statistics instructor wonders whether significant differences exist in her students’ final exam scores in her...
A statistics instructor wonders whether significant differences
exist in her students’ final exam scores in her three different
sections. She randomly selects the scores from 10 students in each
section. A portion of the data is shown in the accompanying table.
Assume exam scores are normally distributed.
Section 1
Section 2
Section 3
60
75
86
94
64
68
56
73
65
57
71
77
60
83
91
86
67
79
66
76
94
85
70
56
82
80
50...
Mid Score Final Score 80 78 87 85 72 81 69 54 86 70 83 73...
Mid Score
Final Score
80
78
87
85
72
81
69
54
86
70
83
73
78
89
75
84
74
86
75
79
84
75
73
63
74
72
73
69
80
86
75
78
72
75
77
68
76
77
66
78
74
77
71
73
85
79
74
74
76
79
76
73
84
72
77
81
78
86
86
76
81
83
78
83
85
86
73
71
83
83
83
79
72
68
83
90...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 4 minutes ago
asked 9 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 2 hours ago
asked 2 hours ago
asked 2 hours ago
asked 2 hours ago
asked 2 hours ago
asked 2 hours ago