Please use correct rounding. 9.3.11 Question Help * The data to the right repres

Question

Please use correct rounding.

9.3.11 Question Help * The data to the right represent the number of days of the growing season over the last 10 years in a certain geographic area. It is known that the data are normally distributed and that s 2268 days Using these values as a simple random sample, construct a 95% confidence interval for the population standard deviation of the number of days in the growing season. 179 159 183 177 220 211 162 215 163 192 The 95% confidence interval is ( (Use ascending order. Round to two decimal places as needed.)

Explanation / Answer

( please try 15.60 to 41.40 if above does not work due to rounding and revert)

here n = 10           s2= 514.3824 Critical value for 9 degree of freedom and 95 % CI are as follows ?2L= ?2 0.025 = 2.700 ?2U= ?2 0.975 = 19.023 (n-1)s2/?2U <=?2<= (n-1)s2/?2L Variance CI 243.360 <=?2<= 1714.608 Std deviation CI 15.60 <=?<= 41.41

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