Question

Farmer Macdonald grows soybeans. The table shows the heights of a random sample of 30 plants after several weeks. What is the z-score of a plant with a height of 70 cm? (Yes, calculate all necessary statistics and answer assuming a normal distribution) 70, 56, 56, 50, 66, 63, 59, 59, 64, 61, 55, 60, 60, 62, 61, 61, 60, 51, 62, 61, 48, 49, 57, 67, 62, 55, 46, 56, 66, 60

Answer #1

Here we calculate form data;

= 58.767

= 5.678

Age of CEO
57
49
57
63
58
56
67
62
61
61
53
58
52
58
56
66
56
59
52
63
52
59
57
64
53
54
65
46
58
58
57
50
62
57
58
52
48
59
54
62
66
46
52
63
57
52
61
50
55
55
64
48
56
58
55
60
51
62
62
50
45
50
52
55
58
57
52
53
61
55
63
54
52
59
50
56
57...

Create a frequency distribution using age and male-yes. It's
supposed to be a bar chart.
Age
55
50
42
47
58
67
64
64
62
43
51
58
42
51
66
69
57
48
51
50
43
46
49
48
55
51
50
41
47
55
54
52
64
68
51
40
53
67
65
47
48
56
64
45
57
50
52
60
66
70
63
63
63
32
70
66
50
67
63
59
63
34
70
50...

The following are heights of a rural middle school’s eighth
graders. The heights are rounded to the nearest inch. Use this
information for questions 6-10.
50
53
54
56
58
59
60
60
62
63
51
53
55
56
58
59
60
61
62
63
51
53
55
57
58
59
60
61
62
63
52
54
56
57
58
59
60
61
62
64
52
54
56
57
58
59
60
62
63
64
6.) Are the heights quantitative...

46 51 52 53 55 55 56 57 58 58 59 60 61 62 62 63 64 67 70 77 What
is the coefficient of variation? A. 11.84% B. 9000% C. 56% D.
1%

2a. Describe the sample and population you are studying.
I am studying customers' satisfaction level with their
car insurance plan.
2b. Calculate the sample mean and sample standard deviation for
your variable. Keep at least four decimal places.
2c. Calculate the standard error and the margin of error for a 90%
confidence interval. Keep at least four decimal places.
Data:
36
18
66
43
28
39
47
40
24
46
48
57
36
58
39
62
43
65
74
36...

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 ...

Exercise 16.037
{Exercise 16.37}
The following exercises require the use of a
computer and software.
Use a 5% significance level for all tests of
hypotheses.
Dataset:
Income
Food
53
188.24
47
304.89
59
304.99
44
283.99
87
316.21
56
263.32
62
315.87
60
201.52
70
295.5
85
318.53
63
278.78
57
254.34
59
253.79
64
310.97
45
215.79
62
248.34
63
299.66
55
220.72
77
319.58
52
280.96
72
259.73
64
254.5
68
181.99
54
256.8
63
258.54
57
203.91...

Kuya is relocating to China to manage a local branch of world
news broadcasting station. He needs to decide on which mobile phone
providers he should select based on a sample data of monthly
charges from various subscribers. He came to you with the data to
determine the provider with the lowest charges, on the average.
Which provider would you advise Kuya to select?
Mobile
Unicom
Telecom
62
60
62
55
71
58
69
64
68
58
65
57
56...

An educational psychologist has developed a new method to
improve reading and writing. However, before designing an
experiment to test the new method, the psychologist needs to know
if the assistants that will grade the essay are consistent. The
psychologist has a random sample of students write an essay on the
same topic. Every essay is then graded by every assistant on a 100
point scale. Below are the essay scores. What can the psychologist
conclude with α = 0.05?...

A randomly selected sample of college basketball players has the
following heights in inches. 65, 62, 64, 61, 68, 61, 63, 70, 66,
71, 65, 62, 61, 66, 69, 71, 69, 67, 65, 65, 65, 71, 67, 63, 71, 67,
68, 63, 66, 70, 69, 64 Compute a 99% confidence interval for the
population mean height of college basketball players based on this
sample and fill in the blanks appropriately. < μ < (Keep 3
decimal places)

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