Q93
21 students took a exam. The sample variance is foundto be 80. The examiner claimsthat based on his past experience the true variance has been atleast 100. Does the sample result shows that the population variance significantly less than 100? [Hint x^2 = ( r - 1 )s ^2 = ( 21 - 1 ) × 80100 = 16 The value of x2 for 20 df 5% level of significance is 31.4. x2 value is less than table value.]
21 students took a exam. The sample variance is foundto be 80. The examiner claimsthat based on his past experience the true variance has been atleast 100. Does the sample result shows that the population variance significantly less than 100?
[Hint
The value of x2 for 20 df 5% level of significance is 31.4. x2 value is less than table value.]
[Hint
The value of x2 for 20 df 5% level of significance is 31.4. x2 value is less than table value.]
A.
The variability is significant
B.
Significant with + 1
C.
The variability is not significant
AnswerD.
All of the above
Answer: Option C
Solution
Answer: Option C
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