A personnel director in a particular state claims that the mean annual income is greater in...
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 random sample of 13 residents had a mean annual income of $40600 and a standard deviation of $8300. In county B, a random sample of 11 residents has a mean annual income of $38500 and a standard deviation of $5700. At a=.025, answer b through e. Assume the population variance s are not equal. If convenient, use technology to solve the problem.
b. Find the critical value (s) and identify the
rejection regions
c. Find the standardized test statistic t=___.
D. Decide whether to reject or fail to reject the null
hypothesis.
e. Interpret the decision in the context of the original claim
with%.
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A personnel director in a particular state claims that
the mean annual income is greater in...
0 A personnel director in a particular state claims that the mean annual income is the...
0 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 $41,200 and a standard deviation of $8400. In County B, a random sample of 14 residents has a mean annual income of $39,000 and a standard deviation of $5900. At a =...
hey personnel director in a particular state claims that the mean at annual income is the...
hey personnel director in a particular state claims that the mean at annual income is the same in one of the states countries country as it is in another country country be in country a random sample of 15 residents has a mean annual income of 4 2500 and a standard deviation of 8800 and country be a random sample of nonresidence has a mean annual income of 38000 and I stated deviation of 5200 at 80 equals zero. 01...
Apel Grector in a partire claim that the manual income in one of the courte county...
Apel Grector in a partire claim that the manual income in one of the courte county his mother country in County Ardone of 10 derisme income $42.00 and a standard deviation of 1300. In County, a random sample of dents has a meancome of 38.00 da vid deviation of 5700010, wwwports rough when verancese The hypothesis Which hypothesis is the cam? There hypothesis, The terrative hypothesis thi Calculated and read the two find to The orice alto Type anger or...
1. A personnel director from Hawaii claims that the mean household income is the same in...
1. A personnel director from Hawaii claims that the mean household income is the same in Kauai County and Maui County. In Kauai County, a sample of 30 residents has a mean household income of $56,900 and a standard deviation of $14,100. In Maui County, a sample of 30 residents has a mean household income of $59,800 and a standard deviation of $7700 At005, can you reject the personnel director's claim? Assume the population varianccs arc not cqual. (o) Which...
1. A personnel director from Hawaii claims that the mean household income is the same in Kauai County and Maui Coun...
1. A personnel director from Hawaii claims that the mean household income is the same in Kauai County and Maui County. In Kauai County, a sample of 30 residents has a mean household income of $56,900 and a standard deviation of $14,100. In Maui County, a sample of 30 residents has a mean household income of $59,800 and a standard deviation of $7700 At005, can you reject the personnel director's claim? Assume the population varianccs arc not cqual. (o) Which...
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A company claims that the mean monthly residential electricity consumption in a certain region is more...
A company claims that the mean monthly residential electricity consumption in a certain region is more than 890 kilowatt-hours (kWh). You want to test this claim. You find that a random sample of 64 residential customers has a mean monthly consumption of 910 kWh. Assume the population standard deviation is 121 kWh. At a = 0.05, can you support the claim? Complete parts (a) through (e). (a) Identify Ho and Ha. Choose the correct answer below. O B. Ho u...
A fitness magazine claims that the mean cost of a yoga session is not more than...
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An employment information service claims the mean annual salary for senior level product engineers is $99,000....
An employment information service claims the mean annual salary for senior level product engineers is $99,000. The annual salaries (in dollars) for a random sample of 16 senior level product engineers are shown in the table to the right. At a 0.01, test the claim that the mean salary is $99,000. Complete parts (a) through (e) below. Assume the population is normally distributed. Annual Salaries 100,635 96.368 93,589 12,740 82,551 74.199 76.962 81,034 102.465 76,125 103,998 103,921 91,002 82,036 85.119...
0 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 $41,200 and a standard deviation of $8400. In County B, a random sample of 14 residents has a mean annual income of $39,000 and a standard deviation of $5900. At a =...
Apel Grector in a partire claim that the manual income in one of the courte county his mother country in County Ardone of 10 derisme income $42.00 and a standard deviation of 1300. In County, a random sample of dents has a meancome of 38.00 da vid deviation of 5700010, wwwports rough when verancese The hypothesis Which hypothesis is the cam? There hypothesis, The terrative hypothesis thi Calculated and read the two find to The orice alto Type anger or...
1. A personnel director from Hawaii claims that the mean household income is the same in Kauai County and Maui County. In Kauai County, a sample of 30 residents has a mean household income of $56,900 and a standard deviation of $14,100. In Maui County, a sample of 30 residents has a mean household income of $59,800 and a standard deviation of $7700 At005, can you reject the personnel director's claim? Assume the population varianccs arc not cqual. (o) Which...
1. A personnel director from Hawaii claims that the mean household income is the same in Kauai County and Maui County. In Kauai County, a sample of 30 residents has a mean household income of $56,900 and a standard deviation of $14,100. In Maui County, a sample of 30 residents has a mean household income of $59,800 and a standard deviation of $7700 At005, can you reject the personnel director's claim? Assume the population varianccs arc not cqual. (o) Which...
Select the correct answer below: A sample mean of 20 miles per gallon and a sample standard deviation of 2 miles per gallon are obtained usin a simple random sample of 16 vehicles from a large group of vehicles, which have approximately normally distributed fuel consumption rates. A simple random sample of 23 dogs is taken from the dogs within a county with approximately normally distributed weights. The sample mean is 33 pounds, the sample standard deviation is 4 pounds,...
A company claims that the mean monthly residential electricity consumption in a certain region is more than 890 kilowatt-hours (kWh). You want to test this claim. You find that a random sample of 64 residential customers has a mean monthly consumption of 910 kWh. Assume the population standard deviation is 121 kWh. At a = 0.05, can you support the claim? Complete parts (a) through (e). (a) Identify Ho and Ha. Choose the correct answer below. O B. Ho u...
A fitness magazine claims that the mean cost of a yoga session is not more than $13. You work for a consumer group and are asked to test this claim. You find that a random sample of 27 yoga sessions has a mean cost of $14.32 and a standard deviation of $2.40. At ?-0.025, do you have enough evidence to reject the magazine's claim? Assume the population is normally distributed. a. Ho HA b. Find the critical value (s) and...
An employment information service claims the mean annual salary for senior level product engineers is $99,000. The annual salaries (in dollars) for a random sample of 16 senior level product engineers are shown in the table to the right. At a 0.01, test the claim that the mean salary is $99,000. Complete parts (a) through (e) below. Assume the population is normally distributed. Annual Salaries 100,635 96.368 93,589 12,740 82,551 74.199 76.962 81,034 102.465 76,125 103,998 103,921 91,002 82,036 85.119...
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