### True or False: For all problems, we must use either the Addition Rule or the Multiplication Rule, but not both.

False

### Exhibit 8-3 Assume you are rolling two fair dice once. Refer to Exhibit 8-3. The probability of obtaining a sum of 2 or 12 equals ____.

0.0556

### The nondirectional alternative hypothesis asserts that ____

the results of the experiment were due to chance alone

### If alpha equals 0.05 and the probability level of your experiment is 0.04, you would ____.

reject the null hypothesis

### In an experiment involving a nondirectional alternative hypothesis, the obtained result was 7 pluses and 1 minus. To evaluate the null hypothesis, which of the following probabilities would you use?

p(0) + p(1) + p(7) + p(8)

### If alpha equals 0.05, how many times out of 100 would you expect to reject the null hypothesis when the null hypothesis is in fact true?

5

### True or false: f results are statistically significant, the independent variable must have had a large effect.

False

### The primary reason we use a scatter plot in linear regression is ____.

to determine if the relationship is linear or curvilinear

### If the value of sY|X = 4.00 for relationship A and sY|X = 5.25 for relationship B, in which relationship would you have the most confidence in a particular prediction?

A

### The points (0,5) and (5,10) fall on the regression line for a perfect positive linear relationship. What is the regression equation for this relationship?

Y' = X + 5

### If the regression line for predicting X given Y were X' = 103Y + 26.2, what would the value of X' be if Y = 0.2?

46.8

### If the correlation between two sets of scores is 0 and one had to predict the value of Y for any given value of X, the best prediction of Y would be ____.

mean

### True or False: If the correlation between two variables is 1.00, the standard error of estimate equals 0.

True

### The closer the points on a scatter diagram fall to the regression line, the ____ between the scores.

higher the correlation

### The proportion of variance accounted for by a correlation between two variables is determined by ____.

r squared

### A correlation between college entrance exam grades and scholastic achievement was found to be -1.08. On the basis of this you would tell the university that ____.

they should hire a new statistician

### When a correlation exists, lowering the range of either of the variables will ____.

lower the correlation

### True or False: For a linear relationship to exist, all the points must fall on a straight line.

False