STATS FINAL EXAM STUDY SESSION

Question 1

When the size of the subgroup selected is proportional to the size of that subgroup in the population, we refer to it as

Accepted Answer

proportionate stratified sampling.

Question 2

Which of the following values could NOT be a chi-square statistic?

Accepted Answer

-57

Question 3

Which of the following is the null hypothesis for a two sample Z-test?

Accepted Answer

\pi1=\pi2, μ1=μ2

Question 4

The probability associated with rejecting the null hypothesis when it is true is called

Accepted Answer

Type I error

Question 5

When it&#x27;s not apparent which variable is the independent variable or dependent variable, it is common for researchers to

Accepted Answer

calculate both the row and column percentages

Question 6

All PRE measures are measures of association

Accepted Answer

True

Question 7

According to the concept of _, 2 vars are associated when info about one can help us improve our prediction of the other

Accepted Answer

proportional reduction of error

Question 8

Once the %ages for a bivariate table are calculated, we then examine the __ of these quantities across the categories

Accepted Answer

difference

Question 9

According to the Central Limit Theorem, if the sample size is larger than 50, the sampling distribution of the mean is

Accepted Answer

approximately normal

Question 10

A bivariate relationship between two vars measured at the ordinal level + in which the vars vary in opposite directions

Accepted Answer

is called a negative relationship

Question 11

Which statement is true about the relationship between the population mean and the mean of the sampling distribution?

Accepted Answer

μӯ = μY

Question 12

Because population parameters are typically unknown, we use the __________to estimate the value of the standard error

Accepted Answer

sample standard deviation

Question 13

A measure of assn. whose value may vary based on which variable is considered the indy var and which the dependent var

Accepted Answer

assymetrical measure of association

Question 14

Sampling error refres to the discrepency between ...

Accepted Answer

a sample estimate of a pop. parameter and the real population parameter

Question 15

Ranges of values within which the population parameter may fall are called

Accepted Answer

interval estimates

Question 16

The introduction of an additional variable into a bivariate relationship to control for its effects is referred to as

Accepted Answer

elaboration

Question 17

The frequencies that are anticipated in a bivariate table if the two variables are statistically independent are called

Accepted Answer

expected frequencies

Question 18

Which is the symbol for the standard error (NOT ESTIMATED)?

Accepted Answer

σȳ

Question 19

Which of the following is the null hypothesis for a two sample t-test?

Accepted Answer

μ1=μ2

Question 20

In a cross tabulation, the intersection of a row and column is referred to as

Accepted Answer

a cell

Question 21

The number of degrees of freedom for a chi-square test is calculated as

Accepted Answer

(r-1)(c-1)

Question 22

The probability associated with obtaining a particular value of Z is referred to as its

Accepted Answer

p-value

Question 23

Which of the following is NOT a parameter?

Accepted Answer

ӯ

Question 24

A __________ test is conducted when we have no theoretical reason for specifying a direction in the research hypothesis.

Accepted Answer

two-tailed test

Question 25

All measures of associaton are PRE measures

Accepted Answer

False

Question 26

Sample size and the confidence level width have a (n) __________ relationship.

Accepted Answer

inverse

Question 27

When examining the % differences in a bivariate table, the larger the % diff., the ___ the relationship between two vars

Accepted Answer

stronger

Question 28

The obtained chi-square statistic summarizes the difference between ______ and ______ in a bivariate table

Accepted Answer

f o; f e

Question 29

The probability at which the null hypothesis is rejected is referred to as

Accepted Answer

alpha

Question 30

Which of the following examples illustrates estimation?

Accepted Answer

The % of folks who support same sex marriage as approximated by a survey

Question 31

Confidence intervals are usually constructed for which of the following statistics?

Accepted Answer

Mean

Question 32

Two sample hypothesis testing assumes that the samples are

Accepted Answer

independent of each other

Question 33

The likelihood that a specified interval will contain the population parameter is referred to as

Accepted Answer

the confidence level

Question 34

The idea that two variables are unrelated in the population is referred to as statistical

Accepted Answer

independence.

Question 35

A Z score of 2.58 is used to calculate a

Accepted Answer

99% confidence interval

Question 36

What is the null hypothesis for a chi-square test?

Accepted Answer

The two variables are unrelated in the population.

Question 37

A PRE of ______ indicates that the two variables are not associated.

Accepted Answer

0

Question 38

For which pair of variables is it impossible to determine the direction of the relationship?

Accepted Answer

Sex and religious preference

Question 39

The null hypothesis is symbolized as

Accepted Answer

H0

Question 40

When conducting a statistical hypothesis test, what is it that we are actually doing?

Accepted Answer

Falsifying the null hypothesis

Question 41

A theoretical probability distribution of all possible sample values for statistics we are interested in is

Accepted Answer

Sampling Distribution

STATS FINAL EXAM STUDY SESSION

Questions 41

STATS FINAL EXAM STUDY SESSION

Questions 41