Question

A recent statistics exam yielded the following 10 scores.
Complete the table below and then construct a frequency polygon
distribution using the class limits. 80, 99, 77, 67, 93, 71, 76,
86, 79, 71

Class Limits, Frequency ,Midpoint ,Class Boundaries, Relative
Frequency,Cumulative Frequency

61-70

71-80

81-90

91-100

Calculate frequency, midpoint, class boundaries,
relative frequency, cumulative frequency

Answer #1

We have given,

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...

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...

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

have a java application need to create an application which is
able to do some analysis on temperature data stored in a data file.
You will be given the “temperatures.dat” data file which contains
the data you must analyze. The analysis you’ll need to do is:
Total number of data points
Find coldest temperature
Find warmest temperature
Find average temperature
Find the frequency of each temperature
Find the most frequent temperature
Find the least frequent temperature
All classes must be...

The Test Scores for a Statistics course are given in the Excel
below.
The data (X1, X2, X3, X4) are for each student.
X1 = score on exam #1
X2 = score on exam #2
X3 = score on exam #3
X4 = score on final exam
Your professor wants to know if all tests are created equal.
What is the F-Stat?
EXAM1
EXAM2
EXAM3
FINAL
73
80
75
65.86667
93
88
93
80.16667
89
91
90
78
96
98...

Sample scores from four different statistics class sections are
shown below. Run an ANOVA test on them and answer the following
questions:
Class 1
Class 2
Class 3
Class 4
95
79
77
81
99
68
91
96
75
84
84
68
76
78
84
89
82
74
75
78
97
93
82
75
93
95
82
88
83
88
85
98
86
95
96
59
What conclusion can we make about the hypothesis test?

Calculate the sample standard deviation and sample variance for
the following frequency distribution of final exam scores in a
statistics class. If necessary, round to one more decimal place
than the largest number of decimal places given in the data.
Final Exam Scores
Class
Frequency
51 - 6051 - 60
1010
61 - 7061 - 70
77
71 - 8071 - 80
1212
81 - 9081 - 90
1111
91 - 10091 - 100
1515

The following scores were received on a recent exam. there were
100 questions asked and 1 point was awarded for each question
answered correctly. No partial credit was allowed.
98, 84, 89, 81, 50, 98, 72, 79, 68, 81, 85, 86, 90, 84, 77, 71,
70, 86, 81, 71, 84, 86, 85, 85, 94
a) based on the above data, construct a frequency distribution
table incorporating each value ( ie. no grouped frequencies)
containing absolute frequencies, relative frequencies, cumulative
frequencies...

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...

The following scores represent a sample of final examination
grades for a statistics course
23 60 98 32 57 74 52 70 82 69 74 63 80 62 80 77 81 95 41 65 92
85 85 61 36 79 55 76 52 10 64 75 78 25 80 48 83 64 88 82 81 67 41
71 67 54 34 72 74 43 60 78 84 89 76 84 17 90 15 79
a) Provide a frequency polygon with...

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