Question

Test a claim that the mean amount of carbon monoxide in the air in U.S. cities is less than 2.31 parts per million. It was found that the mean amount of carbon monoxide in the air for the random sample of 66 cities is 2.41 parts per million and the standard deviation is 2.12 parts per million. At ? = 0.10, can the claim be supported? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Identify the claim and state H? and H?. Which of the following correctly states H? and H?? H?: ? ? 2.31 H?: ? < 2.31 (Type integers or decimals. Do not round.) The claim is the alternative hypothesis. (b) Use technology to find the critical value(s) and identify the rejection region(s). The critical value(s) is/are t? = -1.67, 1.67. (Use a comma to separate answers as needed. Round to two decimal places as needed.) Choose the graph which shows the rejection region. (c) Find the standardized test statistic, t. The standardized test statistic is t = (Use a comma to separate answers as needed. Round to two decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis. (1) H? because the standardized test statistic (2) in the rejection region. (e) Interpret the decision in the context of the original claim. There (3) enough evidence at the % level of significance to (4) the claim that the mean amount of carbon monoxide in the air in U.S. cities is (5) parts per million. (Type integers or decimals. Do not round.)

          Test a claim that the mean amount of carbon monoxide in the air in U.S. cities is less than 2.31 parts per million. It was found that the mean amount of carbon monoxide in the air for the random sample of 66 cities is 2.41 parts per million and the standard deviation is 2.12 parts per million. At ? = 0.10, can the claim be supported? Complete parts (a) through (e) below. Assume the population is normally distributed.
(a) Identify the claim and state H? and H?. Which of the following correctly states H? and H??
H?: ? ? 2.31
H?: ? < 2.31
(Type integers or decimals. Do not round.)
The claim is the alternative hypothesis.
(b) Use technology to find the critical value(s) and identify the rejection region(s).
The critical value(s) is/are t? = -1.67, 1.67.
(Use a comma to separate answers as needed. Round to two decimal places as needed.)
Choose the graph which shows the rejection region.
(c) Find the standardized test statistic, t.
The standardized test statistic is t =
(Use a comma to separate answers as needed. Round to two decimal places as needed.)
(d) Decide whether to reject or fail to reject the null hypothesis.
(1) ______ H? because the standardized test statistic (2) ______ in the rejection region.
(e) Interpret the decision in the context of the original claim.
There (3) ______ enough evidence at the ______ % level of significance to (4) ______ the claim that the mean amount of carbon monoxide in the air in U.S. cities is (5) ______ parts per million.
(Type integers or decimals. Do not round.)

Test a claim that the mean amount of carbon monoxide in the air in U.S. cities is less than 2.31 parts per million. It was found that the mean amount of carbon monoxide in the air for the random sample of 66 cities is 2.41 parts per million and the standard deviation is 2.12 parts per million. At ? = 0.10, can the claim be supported? Complete parts (a) through (e) below. Assume the population is normally distributed.
(a) Identify the claim and state H? and H?. Which of the following correctly states H? and H??
H?: ? ? 2.31
H?: ? < 2.31
(Type integers or decimals. Do not round.)
The claim is the alternative hypothesis.
(b) Use technology to find the critical value(s) and identify the rejection region(s).
The critical value(s) is/are t? = -1.67, 1.67.
(Use a comma to separate answers as needed. Round to two decimal places as needed.)
Choose the graph which shows the rejection region.
(c) Find the standardized test statistic, t.
The standardized test statistic is t =
(Use a comma to separate answers as needed. Round to two decimal places as needed.)
(d) Decide whether to reject or fail to reject the null hypothesis.
(1) H? because the standardized test statistic (2) in the rejection region.
(e) Interpret the decision in the context of the original claim.
There (3) enough evidence at the % level of significance to (4) the claim that the mean amount of carbon monoxide in the air in U.S. cities is (5) parts per million.
(Type integers or decimals. Do not round.)

Added by Steven T.

Question

Please give Ace some feedback