Household size: For the past several years, the mean number of people in a household has been declining. A social scientist believes that in a certain large city, the mean number of people per household is less than 2.5. To investigate this, she takes a simple random sample of 160 households in the city, and finds that the sample mean number of people is 2.4 with a sample standard deviation of 1.6. Can you conclude that the mean number of people per household is less than 2.5? Ho:H =2.5 H :µ <2.5 Part: 0 / 4 Part 1 of 4 (a) Which test is appropriate here? OT test O Ztest Part: 1/ 4 Part 2 of 4 (b) Compute the value of the test statistic. Round your answer to three decimal places. The test statistic is

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Espal
Part: 2 / 4 .
Part 3 of 4
(c) Do you reject H,? Use the a=0.01 level.
O Yes
O No
Part: 3 / 4
Part 4 of 4
(d) State a conclusion.
We (Choose one)
enough evidence to conclude that the mean number of people per household is less than 2.5.
Transcribed Image Text:Espal Part: 2 / 4 . Part 3 of 4 (c) Do you reject H,? Use the a=0.01 level. O Yes O No Part: 3 / 4 Part 4 of 4 (d) State a conclusion. We (Choose one) enough evidence to conclude that the mean number of people per household is less than 2.5.
Espai
Household size: For the past several years, the mean number of people in a household has been declining. A social scientist believes that in a certain large
city, the mean number of people per household is less than 2.5. To investigate this, she takes a simple random sample of 160 households in the city, and finds
that the sample mean number of people is 2.4 with a sample standard deviation of 1.6. Can you conclude that the mean number of people per household is less
than 2.5?
Ho:µ =2.5
H :µ <2.5
Part: 0 / 4
Part 1 of 4
(a) Which test is appropriate here?
OT test
O Z test
Part: 1/ 4
Part 2 of 4
(b) Compute the value of the test statistic. Round your answer to three decimal places.
The test statistic is
Transcribed Image Text:Espai Household size: For the past several years, the mean number of people in a household has been declining. A social scientist believes that in a certain large city, the mean number of people per household is less than 2.5. To investigate this, she takes a simple random sample of 160 households in the city, and finds that the sample mean number of people is 2.4 with a sample standard deviation of 1.6. Can you conclude that the mean number of people per household is less than 2.5? Ho:µ =2.5 H :µ <2.5 Part: 0 / 4 Part 1 of 4 (a) Which test is appropriate here? OT test O Z test Part: 1/ 4 Part 2 of 4 (b) Compute the value of the test statistic. Round your answer to three decimal places. The test statistic is
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