2. A least squares adjustment is computed twice on a data set. When the data is...

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2. A least squares adjustment is computed twice on a data set.When the data is minimally constrained with 10 degrees of freedom,a variance of 1.07 is obtained. In the second run, the fullyconstrained network has 13 degrees of freedom with a variance of1.56. The a priori
estimate for the reference variances in both adjustments areone; that is,
(1) What is the 95% confidence interval for the referencevariance in the minimally constrained adjustment? The populationvariance is one. Does this interval contain one?
(2) What is the 95% confidence interval for the ratio of the twovariances? Is there reason to be concerned about the consistency ofthe control? Statistically justify your response.

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3.7 Ratings (661 Votes)

a Here we need to find the ratio of the variances and so it is given that variance of 1st sample 107 with n1 11 df n1 so 10 n1 so n11 variance of 2nd sample 156 with n2 14 so the hypothesis See Answer

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