# Statistics question hw

The sampling distribution of a statistic is normally distributed with an estimated standard error of 12 (df = 20). (a) What is the probability that you would have gotten a mean of 107 (or more extreme) if the population parameter were 100? Is this probability significant at the .05 level (two-tailed)? (b) What is the probability that you would have gotten a mean of 95 or less (one-tailed)? Is this probability significant at the .05 level? You may want to use the t Distribution calculator for this problem.

 mgreen1234 Posts: 2, Reputation: 10 Junior Member #2 Mar 31, 2012, 04:42 AM
Statistics question hw
The scores of a random sample of 8 students on a physics test are as follows: 60, 62, 67, 69, 70, 72, 75, and 78.

Test to see if the sample mean is significantly different from 65 at the .05 level. Report the t and p values.
The researcher realizes that she accidentally recorded the score that should have been 76 as 67. Are these corrected scores significantly different from 65 at the .05 level?

## Check out some similar questions!

Statistics question [ 1 Answers ]

Original data: 50,60,70,80,90,100 Suppose that a single additional observation is obtained. If the new average is 47.58, what is the value of the additional observation? (Assume that the new average is calculated using the original data shown above and the new observation). 94.6 98.6 97.6...