According to a 2015 Census Bureau survey, 75,511 of the 822,959 residents of Baltimore County, Maryland,...
According to a 2015 Census Bureau survey, 75,511 of the 822,959 residents of Baltimore County, Maryland, were enrolled in college. Consider a sample of 800 residents of Baltimore County, Maryland in 2015 selected at random. Which of the following is closest to the expected value of the number in the sample enrolled in college?
a)8.17
b)28.3
c)66.7
d)73.4
e)94.4
Homework Answers
P(a person is enrolled in college), p = 75,511/822,959
Sample size, n = 800
Expected value of the number in the sample enrolled in college = np
= 800 x 75,511/822,959
= 73.4
Ans: d) 73.4
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