Question

Use the given information to find the number of degrees of​ freedom, the critical values chi...

Use the given information to find the number of degrees of​ freedom, the critical values chi Subscript Upper L Superscript 2χ2L and chi Subscript Upper R Superscript 2χ2R​, and the confidence interval estimate of sigmaσ. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Platelet Counts of Women 98% ​confidence; nequals=27​, sequals=65.7

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Answer #1

df = 27 - 1 = 26

At 98% confidence interval the critical values are = 45.642

                                                                              = 12.198

The 98% confidence interval for is

sqrt((n - 1)s^2/) < < sqrt((n - 1)s^2/)

= sqrt(26 * (65.7)^2/45.642) < < sqrt(26 * (65.7)^2/12.198)

= 49.59 < < 95.92

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