A philanthropic organization knows that its donors have an average age near 60 and is considering taking out an ad in a magazine which mainly focuses on aging issues. An analyst wonders what proportion of their donors are actually 50 yearsold or older. He takes a random sample of the records of 100 donors. The data set in the accompanying table contains the ages of the donor. From the data provided, construct a 99% confidence interval for the proportion of donors who are 50years old or older.E Click the icon to view the data table.i Credit Card Purchase AmountsWhat is the confidence interval? Select the correct choice below and, if necessary, fill in the answer boxes within your choice.O A. The 99% confidence interval is (%,%).Credit Card Purchase Amounts ($)6241346157(Round to one decimal place as needed. Use ascending order.)5454684645O B. The conditions of a confidence interval are not satisfied.676224324565515559554673725165602334646928555367667839706966727468683820596436516358787056647050426869367245555265626068605859517569612066755024647472404567537075647827414667784651Click to select and enter your answer(s).PrintDone

Mean = 56.64 Standard deviation = 14.598 n=100

What is the confidence interval? Select the correct choice below and, if necessary, fill in the answer boxes within your choid O A. The 99% confidence interval is (%. D%). (Round to one decimal place as needed. Use ascending order.) O B. The conditions of a confidence interval are not satisfied.

What is the confidence interval? Select the correct choice below and, if necessary, fill in the answer boxes within your choid O A. The 99% confidence interval is (%. D%). (Round to one decimal place as needed. Use ascending order.) O B. The conditions of a confidence interval are not satisfied.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Average

In mathematics, everyone must have heard the term average in one place or other. Almost all types of calculation require taking out an average. In everyday life, the term is used for denoting a certain amount that can be said to be a typical quantity for multiple people or objects. In other words, if a group of people possesses a certain object, then the average gives us an idea regarding the quantity of the object possessed by each person. However, this is solely based on mathematical calculation. It is important to note that most people will not strictly have the average value in a group.

Question

A philanthropic organization knows that its donors have an average age near 60 and is considering taking out an ad in a magazine which mainly focuses on aging issues. An analyst wonders what proportion of their donors are actually 50 years
old or older. He takes a random sample of the records of 100 donors. The data set in the accompanying table contains the ages of the donor. From the data provided, construct a 99% confidence interval for the proportion of donors who are 50
years old or older.
E Click the icon to view the data table.
i Credit Card Purchase Amounts
What is the confidence interval? Select the correct choice below and, if necessary, fill in the answer boxes within your choice.
O A. The 99% confidence interval is (%,%).
Credit Card Purchase Amounts ($)
62
41
34
61
57
(Round to one decimal place as needed. Use ascending order.)
54
54
68
46
45
O B. The conditions of a confidence interval are not satisfied.
67
62
24
32
45
65
51
55
59
55
46
73
72
51
65
60
23
34
64
69
28
55
53
67
66
78
39
70
69
66
72
74
68
68
38
20
59
64
36
51
63
58
78
70
56
64
70
50
42
68
69
36
72
45
55
52
65
62
60
68
60
58
59
51
75
69
61
20
66
75
50
24
64
74
72
40
45
67
53
70
75
64
78
27
41
46
67
78
46
51
Click to select and enter your answer(s).
Print
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