Question 7 1 pts The scores of a certain population on the Wechsler Intelligence

Question

Question 7 1 pts The scores of a certain population on the Wechsler Intelligence Scale for Children (WISC) are thought to be Normally distributed, with mean and standard deviations 10. I wish to test whether the mean for this population differs from the national average of 100, so I use the hypotheses Ho: = 100 and Hai , #100, based on an simple random sample of size 25 from the population. I calculate a 95% confidence interval for and find it to be 100.76 to 106.24, which of the following is true? O We can reject Ho at level .05 because the null value of 100 does not appear in a 95% confidence interval. o we fail to reject Ho at level .05 because the null value of 100 does not appear in a 95% confidence interval. O The P-value is exactly .05. 0 A mistake has almost certainly been made. The confidence interval must contain 11-100 at least 95% of the time.

Explanation / Answer

option A) is correct

as 100 is not in confidence interval

we can reject the null hypothesis

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