Ten years ago, only 35% of the U.S. population consisted of people more than 65 years old. A researcher plans to use a sample of n = 200 people to determine whether the population distribution has changed during the past ten years. If a chi-square test is used to evaluate the data, what is the expected frequency for the older-than-65 category? Select one: a. 15 b. 35 c. 70 d. 60

MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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Ten years ago, only 35% of the U.S. population consisted of people more than 65 years old. A researcher plans to use a sample of n = 200 people to determine whether the population distribution has changed during the past ten years. If a chi-square test is used to evaluate the data, what is the expected frequency for the older-than-65 category?

Select one:
a.
15
b.
35
c.
70
d.
60
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