The weights of 6 randomly selected mattresses were found to have a variance of 1.48. Construct...
The weights of 6 randomly selected mattresses were found to have a variance of 1.48. Construct the 99% confidence interval for the population variance of the weights of all mattresses in this factory. Round your answers to two decimal places.
(lower and upper endpoint)
Homework Answers
GIVEN:
Sample size of mattresses 
Sample variance 
FORMULA USED:
The formula for confidence interval for the population variance is,
CALCULATION:
SIGNIFICANCE LEVEL:
Significance level = 1 - Confidence level
= 1 - 0.99
= 0.01
CRITICAL VALUE:
At 
degrees of
freedom,
CONFIDENCE INTERVAL:
The 99% confidence interval for the population variance of the weights of all mattresses in this factory is,
Thus the 99% confidence
interval for the population variance of the weights of all
mattresses in this factory is 
.
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