Test a claim that the mean amount of lead in the air in U.S. cities is less than 0.035 microgram per cubic meter. It was found that the mean amount of lead in the air for the random sample of 58 U.S. cities is 0.038 microgram per cubic meter and the standard deviation is 0.069 microgram per cubic meter. claim be supported? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Identify the claim and state Hg and H, (1). (2) H. (3)- (Type integers or decimals. Do not round.) The claim is the (5) hypothesis. (b) Find the critical value(s) and identify the rejection regionis). The critical value(s) islare to = (Use a comma to separate answers as needed. Round to two decimal places as needed) Choose the graph which shows the rejection region. OA. OB. Oc. c. OD. t<- t (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 . (6) H, because the standardized test statistic (7) - -in the rejection region. (e) Interpret the decision in the context of the original claim. There (8). enough evidence at the % level of significance to (9). the claim that the mean amount of lead in the air in U.S. cities is (10). microgram per cubic meter. (Type integers or decimals. Do not round.)
Test a claim that the mean amount of lead in the air in U.S. cities is less than 0.035 microgram per cubic meter. It was found that the mean amount of lead in the air for the random sample of 58 U.S. cities is 0.038 microgram per cubic meter and the standard deviation is 0.069 microgram per cubic meter. claim be supported? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Identify the claim and state Hg and H, (1). (2) H. (3)- (Type integers or decimals. Do not round.) The claim is the (5) hypothesis. (b) Find the critical value(s) and identify the rejection regionis). The critical value(s) islare to = (Use a comma to separate answers as needed. Round to two decimal places as needed) Choose the graph which shows the rejection region. OA. OB. Oc. c. OD. t<- t (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 . (6) H, because the standardized test statistic (7) - -in the rejection region. (e) Interpret the decision in the context of the original claim. There (8). enough evidence at the % level of significance to (9). the claim that the mean amount of lead in the air in U.S. cities is (10). microgram per cubic meter. (Type integers or decimals. Do not round.)
MATLAB: An Introduction with Applications
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Transcribed Image Text:6. Test a claim that the mean amount of lead in the air in U.S. cities is less than 0.035 microgram per cubic meter. It was found that the mean amount of lead in the air for the random sample of 58 U.S. cities is 0.038 microgram per cubic meter and the standard deviation is 0.069 microgram per cubic meter. At a = 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 Ho and Ha
Ho: (1)
На
(3)
(4)
(Type integers or decimals. Do not round.)
The claim is the (5)
hypothesis.
(b) Find the critical value(s) and identify the rejection region(s).
The critical value(s) is/are to =
(Use a comma to separate answers as needed. Round to two decimal places as needed.)
Choose the graph which shows the rejection region.
OA.
OB.
OC.
OD.
- to <t<to
t> to
t<to
t< - to, t> to
(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.
(6)
H, because the standardized test statistic (7)
in the rejection region.
(e) Interpret the decision in the context of the original claim.
There (8)
enough evidence at the
% level of significance to (9)
the claim that the mean amount of lead in the air in U.S. cities is (10)
microgram per cubic meter.
(Type integers or decimals. Do not round.)
(1) O o?
O null
O alternative
O Reject
O Fail to reject
(7) O is not
O is
(9) O reject
O support
O not equal
O greater than or equal
(2) O
(3) О н
(4) O
(5)
(6)
(8)
O is
(10) O less than or equal
O greater than
O equal
O less than
O p
O is not
O p
O o?
00
II N VA
0000
I" N A *
0000
O000
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