Statistics variance problem

Reference no: EM13108708

We are interested in determining whether or not the variances of the sales at two music stores (A & B) are equal. A sample of 10 days of sales at store A has a standard deviation of 30, while a sample of 16 days of sales from store B has a standard deviation of 20.

1) What is the value of the Observed test statistic?

2) What are the results of the hypothesis test at a significance level of 0.05?

Reference no: EM13108708

Questions Cloud

Case study - sudson washer and dryer service : Sudson Washer and Dryer Service is in the business of leasing used washers and dryers to apartment landlords for a contracted lease term. The coin-operated machines are used by apartment tenants.

Conclude that humidity significant effect-eating behavior : Can researcher conclude that humidity has significant effect on eating behavior? Use a two-tail test with α = .05. Calculate estimated Cohen's d and r2 to measure size of treatment effect.

How have humans made their task harder : Why cant microbes that naturally clean up the environment continue to do so as in the past? How have humans made their task harder? Easier?

What is the chance it would be purple : Two pea plants heterzozygous fro purple flowers. They produce 100 seeds. If you pick one and let it grown what is the chance it would be white. What is the chance it would be purple?

Statistics variance problem : We are interested in determining whether or not the variances of the sales at two music stores (A & B) are equal. A sample of 10 days of sales at store A has a standard deviation of 30, while a sample of 16 days of sales from store B has a standar..

Determining relative risk : A multicenter clinical trial involving 17,000 patients suspected of having acute myocardial infarction was conducted. The vascular death rate after 5 weeks was compared in patients receiving aspirin versus those not receiving aspirin

Discussion on constitutional law : Fun Products, Inc. is in the business of designing computer games. At the end of a particularly successful year, company management decided to throw a celebration party at which it would announce large bonuses for the entire workforce.

Determine the adequate result to conclude the case : Is this result adequate to conclude that monkeys spent significantly more time with softer mother than would be expected if there were no preference? Use the two-tailed test with α = .05.

Statistical testing - t tests and proportions : Do men and women have different beliefs on the ideal number of children in a family? Based on the following GSS2008 Data and the obtained t statistics, what would you conclude?

User Account

All Pages