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Listed below are the lead concentrations in
μ​g/g
measured in different traditional medicines. Use a
0.01
significance level to test the claim that the mean leadconcentration for all such medicines is less than
15
μ​g/g.
Assume that the sample is a simple random sample.
7     
12     
6.5     
9.5     
10.5     
15.5     
7     
22     
9.5     
19
Question content area bottom
Part 1
Assuming all conditions for conducting a hypothesis testare​ met, what are the null andalternative​ hypotheses?
A.
H0​:
μ>15
μ​g/g
H1​:
μ<15
μ​g/g
B.
H0​:
μ=15
μ​g/g
H1​:
μ<15
μ​g/g
C.
H0​:
μ=15
μ​g/g
H1​:
μ≠15
μ​g/g
D.
H0​:
μ=15
μ​g/g
H1​:
μ>15
μ​g/g
Part 2
Determine the test statistic.
enter your response here
​(Round to two decimal places as​ needed.)
Part 3
Determine the​ P-value.
enter your response here
​(Round to three decimal places as​ needed.)
Part 4
State the final conclusion that addresses the originalclaim.
▼
Fail to reject
Reject
H0.
There is
▼
sufficient
not sufficient
evidence to conclude that the mean lead concentration for allsuch medicines is
▼
not
equal to
greater than
less than
15