A small-business Web site contains 100 pages and 60%, 30%, and 10% of the pages contain low, moderate, and high graphic content, respectively. A sample of four pages is selected without replacement, and X and Y denote the number of pages with moderate and high graphics output in the sample, respectively. What is the marginal standard deviation of the number of pages among those chosen with high graphics?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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The answer is not 0.596.

A small-business Web site contains 100 pages and 60%, 30%, and 10% of the pages contain
low, moderate, and high graphic content, respectively. A sample of four pages is selected without
replacement, and X and Y denote the number of pages with moderate and high graphics output
in the sample, respectively.
What is the marginal standard deviation of the number of pages among those chosen with
high graphics?
Transcribed Image Text:A small-business Web site contains 100 pages and 60%, 30%, and 10% of the pages contain low, moderate, and high graphic content, respectively. A sample of four pages is selected without replacement, and X and Y denote the number of pages with moderate and high graphics output in the sample, respectively. What is the marginal standard deviation of the number of pages among those chosen with high graphics?
Setup the complete pmf first. Here's a part of the pmf table:
2
???
???
3
???
1
4
O 0.124357822
???
???
1
???
???
???
0.020657
0.000918
???
Y
2
???
???
???
???
???
???
???
4 5.35547E-05
???
???
???
Transcribed Image Text:Setup the complete pmf first. Here's a part of the pmf table: 2 ??? ??? 3 ??? 1 4 O 0.124357822 ??? ??? 1 ??? ??? ??? 0.020657 0.000918 ??? Y 2 ??? ??? ??? ??? ??? ??? ??? 4 5.35547E-05 ??? ??? ???
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