BASIC PRACTICE OF STATISTICS(REISSUE)>C
8th Edition
ISBN: 9781319341831
Author: Moore
Publisher: MAC HIGHER
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Question
Chapter 6, Problem 6.8CYS
To determine
To find: How many individuals are described in this table.
Expert Solution & Answer
Answer to Problem 6.8CYS
The correct option is (b) 1,918.
Explanation of Solution
Reason for correct answer:
The data shows the number of cell phone users who tends to use social media on their phone and the data is separated according to their age group.
| Social media usage on Phone | Yes | No |
| 18-29 | 228 | 112 |
| 30-49 | 281 | 281 |
| 50-64 | 106 | 481 |
| 65+ | 21 | 408 |
The total number of individuals given in the data is calculated as follows:
Thus, the option (b) 1,918 is correct.
Reason for incorrect answers:
Option (a) 636.
The given option represents the total number of individuals are 636. But, there are 1,918 individuals given in the data.
Option (c) Need more information.
The given option represents the information given is not sufficient enough to find the number of individuals. But, there is sufficient information given in the data to obtain the total number of individuals.
Thus, the Options (a) and (c) are incorrect.
Conclusion:
Thus, the total number of individuals given in the data is 1,918. Thus, the correct option is (b) 1,918.
Statistics Concept Introduction
Introduction:
Individual:
Individuals may be defined as the object used for describing the data. Also, an individual may be people, animals or things.
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Students have asked these similar questions
2. [15] Let X and Y be two discrete RVs whose joint PMF is given by the following table:
y
Px,y(x, y)
-1
1
3
0
0.1
0.04
0.02
I
2
0.08
0.2
0.06
4
0.06
0.14
0.30
(a) Find P(X ≥ 2, Y < 1).
(b) Find P(X ≤Y - 1).
(c) Find the marginal PMFs of X and Y.
(d) Are X and Y independent? Explain
(e) Find E(XY) and Cov(X, Y).
32. Consider a normally distributed population with mean μ = 80
and standard deviation σ = 14.
a.
Construct the centerline and the upper and lower control
limits for the chart if samples of size 5 are used.
b. Repeat the analysis with samples of size 10.
2080 101
c. Discuss the effect of the sample size on the control limits.
Consider the following hypothesis test.
The following results are for two independent samples taken from the two populations.
Sample 1
Sample 2
n 1 = 80
n 2 = 70
x 1 = 104
x 2 = 106
σ 1 = 8.4
σ 2 = 7.6
What is the value of the test statistic? If required enter negative values as negative numbers (to 2 decimals).
What is the p-value (to 4 decimals)? Use z-table.
With = .05, what is your hypothesis testing conclusion?
Chapter 6 Solutions
BASIC PRACTICE OF STATISTICS(REISSUE)>C
Ch. 6.1 - Prob. 1AYKCh. 6.1 - Prob. 2AYKCh. 6.2 - Prob. 3AYKCh. 6.2 - Prob. 4AYKCh. 6.2 - Prob. 5AYKCh. 6.3 - Prob. 6AYKCh. 6.3 - Prob. 7AYKCh. 6 - Prob. 6.8CYSCh. 6 - Prob. 6.9CYSCh. 6 - Prob. 6.10CYS
Ch. 6 - Prob. 6.11CYSCh. 6 - Prob. 6.12CYSCh. 6 - Prob. 6.13CYSCh. 6 - Prob. 6.14CYSCh. 6 - Prob. 6.15CYSCh. 6 - Prob. 6.16CYSCh. 6 - Prob. 6.17CYSCh. 6 - Prob. 6.18ECh. 6 - Prob. 6.19ECh. 6 - Prob. 6.20ECh. 6 - Prob. 6.21ECh. 6 - Prob. 6.22ECh. 6 - Prob. 6.23ECh. 6 - Prob. 6.24ECh. 6 - Prob. 6.25ECh. 6 - Prob. 6.26ECh. 6 - Prob. 6.27ECh. 6 - Prob. 6.28ECh. 6 - Prob. 6.29ECh. 6 - Prob. 6.30ECh. 6 - Prob. 6.31ECh. 6 - Prob. 6.32ECh. 6 - Prob. 6.33E
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