# Psychological Statistics

### 39 terms by sarah2x2x

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False

True

0.0625

0.6667

### If p(A and B) = 0, then A and B must be ____.

mutually exclusive

0 and 1

0.6480

0.0060

0.0556

p(A)p(B)

### 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)

### The alpha level ____.

is determined by the consequences of making a Type I and Type II error

5

beta increases

### An alpha level of 0.05 indicates that ___

the probability of a Type II error is 0.05

true

False

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

to determine if the relationship is linear or curvilinear

A

### If bY is negative, higher values of X are associated with ____.

lower values of Y

horizontal

Y' = X + 5

46.8

### The regression of Y on X ____.

4. predicts Y given X

mean

True

False

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

higher the correlation

-0.98

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

### If N is small, an extreme score ____.

might have a large effect on robt

2.00

0.70

False

False

Example: