A personnel director in a particular state claims that the mean annual income is the same in one of the state's counties (County A) as it is in another county (County B). In County A, a random sample of 17 residents has a mean annual income of $42,200 and a standard deviation of $8300. In County B, a random sample of 14 residents has a mean annual income of $39,900 and a standard deviation of $5900. At a = 0.05, answer parts (a) through (e). Assume the population variances are not equal. Assume the samples are random and independent, and the populations are normally distributed. (a) Identify the claim and state Ho and Ha. Which is the correct claim below? O A. "The mean annual income in County A is greater than in County B." O B. "The mean annual incomes in Counties A and B are equal." OC. "The mean annual income in County A is less than in County B." O D. "The mean annual incomes in Counties A and B are not equal." What are Ho and H? The null hypothesis, Ho, is The alternative hypothesis, Ha, is Which hypothesis is the claim? O The alternative hypothesis, H, The null hypothesis, Ho

A personnel director in a particular state claims that the mean annual income is the same in one of the state's counties (County A) as it is in another county (County B). In County A, a random sample of 17 residents has a mean annual income of $42,200 and a standard deviation of $8300. In County B, a random sample of 14 residents has a mean annual income of $39,900 and a standard deviation of $5900. At a = 0.05, answer parts (a) through (e). Assume the population variances are not equal. Assume the samples are random and independent, and the populations are normally distributed. (a) Identify the claim and state Ho and Ha. Which is the correct claim below? O A. "The mean annual income in County A is greater than in County B." O B. "The mean annual incomes in Counties A and B are equal." OC. "The mean annual income in County A is less than in County B." O D. "The mean annual incomes in Counties A and B are not equal." What are Ho and H? The null hypothesis, Ho, is The alternative hypothesis, Ha, is Which hypothesis is the claim? O The alternative hypothesis, H, The null hypothesis, Ho

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

it is all in one question

A personnel director in a particular state claims that the mean annual income is the same in one of the state's counties (County A) as it is in another county (County B). In County A, a random sample of 17 residents has a mean annual income of
$42,200 and a standard deviation of $8300. In County B, a random sample of 14 residents has a mean annual income of $39,900 and a standard deviation of $5900. At a = 0.05, answer parts (a) through (e). Assume the population variances are
not equal. Assume the samples are random and independent, and the populations are normally distributed.
(a) Identify the claim and state Ho and Ha.
Which is the correct claim below?
O A. "The mean annual income in County A is greater than in County B."
O B. "The mean annual incomes in Counties A and B are equal."
OC. "The mean annual income in County A is less than in County B."
O D. "The mean annual incomes in Counties A and B are not equal."
What are Ho and H?
The null hypothesis, Ho, is
The alternative hypothesis, Ha, is
Which hypothesis is the claim?
O The alternative hypothesis, H,
The null hypothesis, Ho

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