A laboratory claims that the mean sodium level, μ, of a healthy adult is 139 mEq per liter of blood. To test this claim, a random sample of 34 adult patients is evaluated. The mean sodium level for the sample is 143  mEq per liter of blood. It is known that the population standard deviation of adult sodium levels is 10 mEq. Assume that the population is normally distributed. Can we conclude, at the 0.1 level of significance, that the population mean adult sodium level differs from that claimed by the laboratory? Perform a two-tailed test. Then fill in the table below.   The null hypothesis: H0:   The alternative hypothesis: H1:   The type of test statistic: (Chooseone)Z t Chi square F             The value of the test statistic: (Round to at least three decimal places.)   The two critical values at the  0.1  level of significance: (Round to at least three decimal places.) and Can we conclude that the population mean adult sodium level differs from that claimed by the laboratory?   Yes     No

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A laboratory claims that the mean sodium level, μ, of a healthy adult is 139 mEq per liter of blood. To test this claim, a random sample of 34 adult patients is evaluated. The mean sodium level for the sample is 143  mEq per liter of blood. It is known that the population standard deviation of adult sodium levels is 10 mEq. Assume that the population is normally distributed. Can we conclude, at the 0.1 level of significance, that the population mean adult sodium level differs from that claimed by the laboratory? Perform a two-tailed test. Then fill in the table below.

 
The null hypothesis:
H0:
 
The alternative hypothesis:
H1:
 
The type of test statistic:

(Chooseone)Z t

Chi square

F

     
     
The value of the test statistic:
(Round to at least three decimal places.)
 
The two critical values at the 
0.1
 level of significance:
(Round to at least three decimal places.)
and
Can we conclude that the population mean adult sodium level differs from that claimed by the laboratory?
 
Yes
 
 
No

 

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