A personnel director in a particular state claims that the mean annual income is greater in one of the state's counties (county A) than it is in another county (county B). In County A, a random sample of 12 residents has a mean annual income of $42,000 and a standard deviation of $8700. In County B, a random sample of 10 residents has a mean annual income of $39,200 and a standard deviation of $5700. At α=0.005, answer parts (a) through (e). Assume the population variances are not equal. If convenient, use technology to solve the problem. Enter the critical value Find the standardized test statistic.
A personnel director in a particular state claims that the mean annual income is greater in one of the state's counties (county A) than it is in another county (county B). In County A, a random sample of 12 residents has a mean annual income of $42,000 and a standard deviation of $8700. In County B, a random sample of 10 residents has a mean annual income of $39,200 and a standard deviation of $5700. At α=0.005, answer parts (a) through (e). Assume the population variances are not equal. If convenient, use technology to solve the problem. Enter the critical value Find the standardized test statistic.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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A personnel director in a particular state claims that the mean annual income is greater in one of the state's counties (county A) than it is in another county (county B). In County A, a random sample of 12 residents has a mean annual income of $42,000 and a standard deviation of $8700. In County B, a random sample of 10 residents has a mean annual income of $39,200 and a standard deviation of $5700. At α=0.005, answer parts (a) through (e). Assume the population variances are not equal. If convenient, use technology to solve the problem.
Enter the critical value
Find the standardized test statistic.
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