Listed below are the lead concentrations in muμ​g/g measured in different traditional medicines. Use a 0.010.01 significance level to test the claim that the mean lead concentration for all such medicines is less than 1515 muμ​g/g. Assume that the lead concentrations in traditional medicines are normally distributed.   12     22.5      8     3     9.5      22.5     12.5      13.5     10.5      10.5    What are the null and alternative​ hypotheses?     A. Upper H 0H0​: muμequals=1515 muμ​g/g Upper H 1H1​: muμless than<1515 muμ​g/g Your answer is correct.   B. Upper H 0H0​: muμequals=1515 muμ​g/g Upper H 1H1​: muμgreater than>1515 muμ​g/g   C. Upper H 0H0​: muμgreater than>1515 muμ​g/g Upper H 1H1​: muμless than<1515 muμ​g/g   D. Upper H 0H0​: muμequals=1515 muμ​g/g Upper H 1H1​: muμnot equals≠1515 muμ​g/g Determine the test statistic: ?? ​(Round to two decimal places as​ needed.)

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Listed below are the lead concentrations in
muμ​g/g
measured in different traditional medicines. Use a
0.010.01
significance level to test the claim that the mean lead concentration for all such medicines is less than
1515
muμ​g/g.
Assume that the lead concentrations in traditional medicines are normally distributed.
 
12    
22.5     
8    
3    
9.5     
22.5    
12.5     
13.5    
10.5     
10.5
  
What are the null and alternative​ hypotheses?
 
 
A.
Upper H 0H0​:
muμequals=1515
muμ​g/g
Upper H 1H1​:
muμless than<1515
muμ​g/g
Your answer is correct.
 
B.
Upper H 0H0​:
muμequals=1515
muμ​g/g
Upper H 1H1​:
muμgreater than>1515
muμ​g/g
 
C.
Upper H 0H0​:
muμgreater than>1515
muμ​g/g
Upper H 1H1​:
muμless than<1515
muμ​g/g
 
D.
Upper H 0H0​:
muμequals=1515
muμ​g/g
Upper H 1H1​:
muμnot equals≠1515
muμ​g/g
Determine the test statistic: ??
​(Round to two decimal places as​ needed.)
 
 
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