Topics for Exam 2 Review this Firse

Question 1

What are the 3 main characteristics of a normal curve?

Answer 1

Symmetrical, mean, median, mode are all at center of distribution, curve is bell shaped

Question 2

How to compute the z-score from a raw score?

Answer 2

Standard z-score formulaH

Question 3

How to find raw score if given the z-score?

Answer 3

Work backwards from the normal formula

Question 4

What does the process of standardization convert?

Answer 4

Individual scores from different distributions to standard scores which share a common distribution

Question 5

If we wished to compare two scores that are measured on different scales, we would need to transform the scores into ______.

Answer 5

z-scores

Question 6

A ________represents the number of standard deviations a particular score is from the mean.

Answer 6

z-score

Question 7

In a standard normal curve, using the empirical rule, what percentile corresponds to a z-score of 2.0?

Answer 7

98

Question 8

Making meaningful comparisons of variables, even when they were measured on different scales, requires converting those variables to a common scale. This process is called _______.

Answer 8

standardization

Question 9

e

What does any standardized distribution have?

Answer 9

Similar scores in the measures of central tendency

e

Question 10

In a standard normal curve, using the empirical rule, what percentile corresponds to a z-score of 1.0?

Answer 10

84

Question 11

A result that is statistically significant does not mean that it is _________.

Answer 11

Important in the real world

Question 12

Hypothesis testing alone may oversimplify results. Which of the following is a way to enhance our analysis?

Answer 12

statistical power analyses, effect size calculations

Question 13

What does increasing the sample size do?

Answer 13

Increases the likelihood that we will reject the null hypothesis

Question 14

What is empirical probability?

Answer 14

Based on actual experiments of occurrence of events, total # of events/trials

Question 15

What is the independent rule in multiplicative theorem?

Answer 15

P(A) x P(B)

Question 16

What is the dependent rule in multiplicative theorem?

Answer 16

P(A) x P(A | B)

Question 17

What is the multiplicative rule?

Answer 17

Probability of 2 events happening together?

Question 18

What is the additive theory used for?

Answer 18

Predicting likelihood of any one of several events

Question 19

What theorem assumes mutually exclusive?

Answer 19

Additive

Question 20

How does size effect standard error?

Answer 20

Smaller as sample size is bigger

Question 21

What do bigger samples give us?

Answer 21

Better estimates of the population

Question 22

What does central limit theorem state?

Answer 22

As distributions approach normal shape size of samples increased

Question 23

In a probability experiment, an event consists of ___________.

Answer 23

A subset of the sample space

Question 24

Probability can be defined as the likelihood of an event expressed in _______ terms.

Answer 24

numerical, mathematical, quantitative

Question 25

Fill in the following series of events: Probability experiment → trial → ________\

Answer 25

outcome

Question 26

what is inferential statistics?

Answer 26

drawing conclusions about pop based on sample it is taken from, large group from small

Question 27

If the sample size is very large and the decision is to reject null……..

Answer 27

True difference may be inconsequential from a practical importance POV

Question 28

what is descriptive statistics?

Answer 28

Summarizing data collected