Question

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 |

26 | 72 | 79 |

27 | 99 | 89 |

28 | 58 | 53 |

29 | 82 | 78 |

30 | 72 | 82 |

31 | 77 | 69 |

32 | 95 | 98 |

33 | 72 | 93 |

34 | 71 | 80 |

35 | 72 | 82 |

36 | 96 | 96 |

37 | 72 | 61 |

38 | 89 | 84 |

39 | 94 | 97 |

40 | 85 | 89 |

41 | 60 | 72 |

42 | 66 | 93 |

43 | 96 | 84 |

44 | 83 | 87 |

45 | 88 | 99 |

46 | 92 | 97 |

47 | 80 | 92 |

48 | 80 | 93 |

49 | 91 | 78 |

50 | 74 | 82 |

51 | 96 | 99 |

52 | 80 | 72 |

53 | 62 | 79 |

54 | 70 | 75 |

55 | 87 | 90 |

56 | 90 | 95 |

Using the dataset Student Grades, estimate the relationship between students' test and his/her grade.

A) If the student scored a 67 on test, what do you predict as his/her grade?

Answer #1

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...

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...

TestScore
53
53
56
56
56
58
58
58
59
59
59
60
60
62
63
63
63
64
65
65
66
67
67
67
67
68
69
69
69
69
71
71
72
72
72
72
73
73
73
73
73
74
75
75
75
76
76
76
76
77
77
77
77
77
78
78
78
79
79
79
79
80
80
80
80
80
80
81
81
81
82
82
83
83
83
83
84
84
84...

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
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

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...

Create the appropriate frequency distribution graph by
hand.
Below are the speeds of cars clocked by radar on a 35-mph zone of a
road on a particular afternoon.
99, 96, 94, 91, 90, 90, 89, 87, 85, 84, 82,
80, 79, 78, 77, 76, 34, 75, 75, 74, 74, 72,
70, 69, 68, 68, 68, 66, 66, 65, 63, 63, 60,
59, 58, 58, 54, 50, 48, 46, 42, 38, 33, 12

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 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 data file ExxamScores shows the 40 students
in a TOM 3010 course exxam scores for the Middtermm and Final
exxam. Is there statistically significant evidence to show that
students score lower on their final exxam than middtermm exxam?
Provide the p-value for this analysis.ROUND TO 4 DECIMAL
PLACES.
ExxamScores
Student ID #
Middtermmm
Final
56065
97
64
79499
95
85
59716
89
72
83504
79
64
77735
78
74
57760
87
93
78204
83
70
81177
94
79
54398...

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