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A credit company has gathered information regarding the average amount owed by people under 30 years ...

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A credit company has gathered information regarding the average amount owed by people under 30 years ...

A credit company has gathered information regarding the average amount owed by people under 30 years old and by people over 30 years. Independent random samples were taken from both age groups. You are given the following information.

	Under 30	Over 30
	600	550
n	200	300
σ²	361	400

Construct a 95% confidence interval for the difference between the average amounts owed by the two age groups.

Textbook

Essentials of Statistics for Business and Economics

Edition: 7^th

Authors: Anderson, Sweeney, Williams, Camm, Cochran

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Just got PERFECT on my quiz

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