Author Question: A sample of 150 individuals (males and females) was surveyed, and the individuals were asked to ... (Read 90 times)

redpassion · **on:** Mar 25, 2023

Question 1

A poll was taken this year asking college students if they considered themselves overweight. A similar poll was taken five years ago. Results are summarized below. Has the proportion increased significantly? Let α = 0.05.

	Sample Size	Number Considered Themselves Overweight
Present Sample	300	150
Previous sample	275	121

Question 2

A sample of 150 individuals (males and females) was surveyed, and the individuals were asked to indicate their yearly incomes. Their incomes were categorized as follows.

Category 1	$20,000	up to	$40,000
Category 2	$40,000	up to	$60,000
Category 3	$60,000	up to	$80,000

The results of the survey are shown below.

Income Category	Male	Female
Category 1	10	30
Category 2	35	15
Category 3	15	45

We want to determine if yearly income is independent of gender.

a.	Compute the test statistic.
b.	Using the p-value approach, test to determine if yearly income is independent of gender.

dude123 · **Reply #1 on:** Mar 25, 2023

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