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Find the 95% confidence interval for the variance of the weights of containers of motor oil if a sample of 14 containers has a variance

Find the 95% confidence interval for the variance of the weights of containers of motor oil if a sample of 14 containers has a variance of 3.2. Assume the variable is normally distributed

a. 5.382 <2< 26.576
b. 1.68 <2< 8.31
c. 2.319 <2< 5.155
d. 1.296 <2< 2.883

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