True or False: For all problems, we must use either the Addition Rule or the Multiplication Rule, but not both.
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 ____.
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?
True or false: f results are statistically significant, the independent variable must have had a large effect.
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?
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?
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 ____.
True or False: If the correlation between two variables is 1.00, the standard error of estimate equals 0.
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 ____.
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.