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The two properties about a set of measurements of a dependent variable that we are most interested in describing are:

 

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Question 2 (1 point)

 
 

The ________________ is the sum of all the scores divided by the number of scores.

 

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Question 3 (1 point)

 
 

The generally preferred measure of central tendency is usually the

 

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Question 4 (1 point)

 
 

Which of the following is the most useful descriptive statistic for measuring dispersion?

 

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Question 5 (1 point)

 
 

The standard deviation is

 

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Question 6 (1 point)

 
 

If the mean I.Q. is 100 and the standard deviation of I.Q. scores is 15, then an I.Q. of 130 will have a z score (or standard score) of

 

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Question 7 (1 point)

 
 

Inferential statistics allow you to decide whether a difference between the experimental and the control group is due to _______________ or ________________.

 

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Question 8 (1 point)

 
 

The null hypothesis suggests that the two samples come from ___________ distribution(s), and the experimental hypothesis suggests that the two samples come from _____________ distribution(s).

 

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Question 9 (1 point)

 
 

The power of a statistical test refers to its ability to

 

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Question 10 (1 point)

 
 

Simple analysis of variance is used in designs having

 

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Question 11 (1 point)

 
 

The number of participants in a study is denoted by

 

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Question 12 (1 point)

 
 

A _____________ is a complete set of measurements.

 

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Question 13 (1 point)

 
 

_____________ is one way of ensuring that a sample is representative of the population.

 

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Question 14 (1 point)

 
 

If we conduct an experiment on average young, white, college males, inferential statistics allow us to generalize to the population of

 

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Question 15 (1 point)

 
 

If we apply an alpha level of .05, and there really is no effect of the experimental manipulation, then one should make
a Type I error

 

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Question 16 (1 point)

 
 

Which of the following would be considered the most conservative alpha level?

 

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Question 17 (1 point)

 
 

The prediction that alcohol slows reaction time is

 

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Question 18 (1 point)

 
 

Two-tailed tests are _______________ conservative and ______________ powerful than one-tailed tests.

 

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Question 19 (1 point)

 
 

The _____________ indicates the number of scores that are free to vary.

 

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Question 20 (1 point)

 
 

The ____________ is used to analyze the results when there are more than two groups.

 

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Question 21 (1 point)

 
 

The __________ maintains that two conditions do not differ.

 

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Question 22 (1 point)

 
 

A conservative statistical test is one that

 

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Question 23 (1 point)

 
 

What are inferential statistics used for?

 

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Question 24 (1 point)

 
 

Descriptive statistics are used to:

 

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Question 25 (1 point)

 
 

Which of the following is not a characteristic of the normal curve:

 
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