When the null hypothesis is rejected, then

When the null hypothesis is rejected, then
 
  a. the chance explanation is completely ruled out
  b. the chance explanation, though not ruled out, becomes improbable
  c. the chance explanation is fully accepted
  d. the chance explanation becomes irrelevant

Question 2

For the following set of sample scores, find the estimated standard error of the mean: 25, 21, 17, 16, 15, 14, 11, 8, 7.
 
  What will be an ideal response?

Question 3

Is this a reliable test?
 
  What will be an ideal response?

Question 4

When sample scores are compared with a population value that is known to be true, we are able to use the one-sample t ratio.
 
  Indicate whether the statement is true or false