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1 2 3 5 6 The scores on an examination in psychology are approximately normally distributed...

Question

1 2 3 5 6 The scores on an examination in psychology are approximately normally distributed...

1 2 3 5 6 The scores on an examination in psychology are approximately normally distributed with mean 500 and an unknown stan
1 2 3 5 6 The scores on an examination in psychology are approximately normally distributed with mean 500 and an unknown standard deviation. The following is a random sample of scores from this examination 410,438, 469, 501, 527, 539,586 Find a 90% confidence interval for the population standard deviation. Then complete the table below Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places What is the lower limit of the 90% confidence interval? What is the upper limit of the 90% confidence interval? X PE

Answers

ANSWER:

+(501-495.71)2+ (527-495-71)+(539-495.715 Given, random sample of scores - 410,438,469,501,527,539,586 &=0.05 Sample n = 7 41x² (alpha/2, n-1) = x²(0.05/2,7-1) - X?(0.025,6) 14.449 (:chi-square table) X? (1-alphal 2, n-1) = x2(1-0.0572 , 7-1) =x² (0.3. .: Lower limit 36.49 upper limit 124.74


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