Twenty-one students took a management course examination. The sample variance is found to be 80. The teacher claims that based on his past experience the true variance has been at least 100. Does the sample result show that the population variance significantly less than 100?
| A. | The variability is not significant |
| B. | Significant with +1 |
| C. | The variability is significant |
| D. | All of the above |
Answer : A Explanation :
The value of X2 for 20 d.f. 5% level of significance 31.4. The variability is no significant. Hence the answer is (c). |
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Option: A Explanation : Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. |
