Statistical Significance Exercises
#4) 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.
(a) Test to see if the sample mean is significantly different from 65 at the 0.05 level.
Report the test statistic (t-value)
Report the P-value
Your results should NOT indicate that the mean of the 8 scores is significantly different from 65. However, what happens if the 67 were mis-recorded (it should have been a 76).
Report the test statistic (t-value) for the correct 8 scores:
Report the P-value for the correct 8 scores:
What can you conclude from the sample of correct 8 scores?
#4) 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.
(a) Test to see if the sample mean is significantly different from 65 at the 0.05 level.
Report the test statistic (t-value)
Report the P-value
Your results should NOT indicate that the mean of the 8 scores is significantly different from 65. However, what happens if the 67 were mis-recorded (it should have been a 76).
Report the test statistic (t-value) for the correct 8 scores:
Report the P-value for the correct 8 scores:
What can you conclude from the sample of correct 8 scores?