Question 33

20 randomly selected statistics students were given 15 multiple-choice questions and 15 open-ended questions all on the same material. The professor was interested in determining which type of questions the students scored higher. This experiment is an example of

None of the alternative answers is correct.

a one sample test of means.

a two sample test of means.

a matched sample test of means.

Question 34

The least squares technique minimizes the sum of the squares of the vertical distances between the actual Y values and the predicted values of Y.

True

False

Question 35

Hypothesis testing is a procedure based on sample evidence and probability theory to decide whether the hypothesis is a reasonable statement.

True

False

Question 36

If we are testing for the difference between two population means and assume that the two populations have unequal and unknown standard deviations, the degrees of freedom for the test statistic

Not enough information is given to answer this question.

are irrelevant because we should use the normal distribution.

equal n1 + n2 - 2.

must be computed.