Question
In: Statistics and Probability
The claim is that the IQ scores of statistics professors are normally distributed, with a mean...
The claim is that the IQ scores of statistics professors are normally distributed, with a mean less than 125. A sample of 19 professors had a mean IQ score of 123 with a standard deviation of 4. Find the value of the test statistic. The value of the test statistic is .....
Solutions
Expert Solution
Solution :
This is the left tailed test .
The null and alternative hypothesis is ,
H0 : 
= 125
Ha :
< 125
Test statistic = z
= (
- 
) / 
/ 
n
= (123 - 125) / 4 /
19 = -2.179
The value of the test statistic is -2.179
orchestra answered 2 years agoRelated Solutions
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