Explore BrainMass

# Calculating degrees of freedom, t-tests and critical values

Not what you're looking for? Search our solutions OR ask your own Custom question.

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

Suppose that a one-tailed t-test is being applied to find out if the population mean is less than \$212. The level of significance selected is 0.01 and 26 accounts are sampled. What is the critical value?

A machine is set to fill the small size packages of M&M candies with 56 candies per bag. A sample revealed: 3 bags of 56, 2 bags of 57, 1 bag of 55, and 2 bags of 58. How many degrees of freedom are there?

A random sample of size 15 is selected from a normal population. The population standard deviation is unknown. Assume that a two-tailed test at the 0.10 significance level is to be used. For what value of t will the null hypothesis be rejected?

When is it appropriate to use the paired difference t -test?

What is the critical value for a one-tailed hypothesis test in which a null hypotheses is tested at the 5% significance level based on a sample size of 25?