1. What is NOT true of the alpha in hypothesis testing

A) It is the probability of a Type I error.

B) It is determined by the researcher.

C) The larger it is, the harder it is to reject the null.

D) It is the level of significance.

2. The Central Limit Theorem is one of the properties of ...

A) a normal curve.

B) a sampling distribution of the mean.

C) a probability distribution of the variance.

D) a frequency distribution of a discrete variable.

E) None of the above are correct.

3. Which of these variables is most likely to be described by a symmetrical Normal model?

A) hair color B) income C) adult foot size D) # of languages spoken E) # of cars owned

4. If, on average, y decreases as x increases, the Pearson's correlation coefficient, r, is...

A) above 1 B) below -1 C) positive D) negative E) near zero

5. A linear model is appropriate if the residual plot shows...

A) a strong pattern B) a curved pattern C) a constant random pattern D) a negative pattern