# Confidence level for variance

Not what you're looking for?

You randomly select and measure the contents of 10 bottles of cough syrup. The results (in fluid ounces are shown.

4.216 4.292 4.252 4.244 4.186

4.281 4.269 4.243 4.222 4.231

Assume the sample is taken from a normally distributed population. Construct 98% confidence intervals for (a) σ2 the population variances and (b)the population standard deviation σ.

a)The confidence interval for the population variance is ( ___,___)

b)The confidence interval for the population standard deviation is ( ___,___)

##### Purchase this Solution

##### Solution Summary

Step by step method for computing confidence interval for variance and standard deviation.

##### Solution Preview

Statistics

You randomly select and measure the contents of 10 bottles of cough syrup. The results (in fluid ounces are shown.

4.216 4.292 4.252 4.244 4.186 4.281 4.269 4.243 4.222 4.231

Assume the sample is taken from a normally distributed population. Construct 98% confidence ...

##### Purchase this Solution

##### Free BrainMass Quizzes

##### Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.