Mathematics, 28.07.2019 21:40 shikiaanthony

Ten years ago, only 20% 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?

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Ten years ago, only 20% of the u. s. population consisted of people more than 65 years old. a resear...