Question

The food services division of Cedar River Amusement Park Inc. is studying the amount spend per day on food and drink by families who visit the amusement park. A sample of 40 families who visited the park yesterday revealed they spent the following amounts, in dollars:

77 |
18 |
63 |
84 |
38 |
54 |
50 |
59 |
54 |
56 |
36 |
26 |
50 |
34 |
44 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|

41 |
58 | 58 | 53 | 51 | 62 | 43 | 52 | 53 | 63 | 62 | 62 | 65 | 61 | 52 |

60 |
60 | 45 | 66 | 83 | 71 | 63 | 58 | 61 | 71 |

(a) Organise the data into a frequency distribution. [8]

(b) Describe the distribution. [5]

(c) Construct the relative frequency distribution. [3]

Answer #1

The food services division of Cedar River amusement park Inc. is
studying the amount that families who visit the amusement park
spend per day on food and drink. A sample of 40 families who
visited the park yesterday revealed they spent the following
amounts: $77 $18 $63 $84 $38 $54 $50 $59 $54 $56 $36 $26 $50 $34
$44 41 58 58 53 51 62 43 52 53 63 62 62 65 61 52 60 60 45 66 83 71...

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...

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...

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...

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 vice president of the student organization has asked you to
create an estimate of the proportion of students who have attained
more than 60 credit hours. You ask her what level of confidence she
wants to have in the estimate and she says that she would like to
be 90% confident in the proportion estimate. Create the confidence
interval using the sample data. Write a sentence or two to
communicate the results to her.
Student
More than 60 credit...

1. What is the 95% CI for the mean starting salary of all
employees who stay at least 3 years?
Case Study: Employee Retention at D&Y
Employee
Starting Salary
On Road Pct
State Univ
CIS Degree
Stayed 3 Years
Tenure
1
38900
57%
Yes
Yes
No
11
2
42300
68%
Yes
Yes
No
5
3
39800
75%
No
Yes
No
21
4
35700
29%
No
Yes
Yes
5
40400
71%
No
Yes
No
19
6
36400
62%
No
Yes
No...

You want to test the null hypothesis that the mean amount spent
is less than or equal to $1,400 versus a one-tailed alternative.
Which of the following is the p-value for the test? (Because of
potential roundoff, choose the closest.)
Person
Gender
Married
Age
Children
Salary
Spent
1
Male
No
40
1
107800
1040
2
Male
Yes
41
1
62500
2140
3
Female
Yes
50
3
80000
810
4
Male
Yes
65
3
111400
3370
5
Female
Yes
51
1...

You are a consultant who works for the Diligent Consulting
Group. In this Case, you are engaged on a consulting basis by
Loving Organic Foods. In order to get a better idea of what might
have motivated customers’ buying habits you are asked to analyze
the factors that impact organic food expenditures. You opt to do
this using linear regression analysis.
Case Assignment
Using Excel, generate regression estimates for the following
model:
Annual Amount Spent on Organic Food = α...

To see if a spinner that is divided into 100 equal sections
labeled 1 to 100 is fair, a researcher spins the spinner 1000 times
and records the result. Let X represent the outcome. The table
below shows the probability distribution of the data. Find the mean
and the standard deviation of the probability distribution using
Excel.
Round the mean and standard deviation to two decimal
places.
"x" P(x)
1 0.011
2 0.011
3 0.011
4 0.01
5 0.008
6 ...

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