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1. A hypothesis test had a test statics of -2.57. If this is a left tailed...

1. A hypothesis test had a test statics of -2.57. If this is a left tailed t-test, with a sample size of 15 and a significance level of 5%, what can be concluded?

2. A person claims that their roommate washes their dishes no more than 2 times a week. A hypothesis test on the matter resulted in a test statics of 1.86. If this is a t-test with sample size of 10 and a significance level of 10%, what can be concluded?  

3. A two tailed t-test has the test static 1.782, and is based on a sample size of 20 and a significance level of 0.01. What can be concluded?

4. What is the difference between the null hypothesis and the alternative hypothesis?

Math   Statistics-And-Probability   
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