Question 1

What is the median in the following set of numbers: 1,16,35,14,7

Accepted Answer

A)  1
B)  35
C)  14
D)  7 C

Question 2

A measure of spread around the center of distribution that gives the researcher the score at a specific place within the distribution is called a___________.

Accepted Answer

percentile

Question 3

Which of the following is NOT a technique to help decide if there is a relationship between two variables?

Accepted Answer

A)  a scattergram
B)  cross-tabulation
C)  bell curve
D)  measures of association C

Question 4

A graph that allows a researcher to see bivariate relationships using an X and Y axis is called what?

Accepted Answer

The answer of A graph that allows a researcher to...

Question 5

When more cases in a distribution curve are in the extreme upper or lower areas of the curve,the curve is no longer bell-shaped; it becomes___________.

Accepted Answer

The answer of When more cases in a distribution curve...

Question 6

This coefficient tells the researcher the size and direction of effects in multiple regression analysis and is known as the___________coefficient.

Accepted Answer

The answer of This coefficient tells the researcher the size...

Question 7

A simple table showing how many,or what percent of the cases fall into each variable category is called___________.

Accepted Answer

The answer of A simple table showing how many,or what...

Question 8

When using bivariate statistics,the researcher

Accepted Answer

A)  can look at 2 variables together simultaneously and evaluate the statistical relationships between variables.
B)  uses 8-10 variables at the same time.
C)  uses a diagram and map together.
D)  None of the above

Question 9

The statistical analysis technique used for nonexperimental data analysis in interval and ratio level data is called what?

Accepted Answer

The answer of The statistical analysis technique used for nonexperimental...

Question 10

A Z-score is a standardized measure that uses what two measures in one score?

Accepted Answer

The answer of A Z-score is a standardized measure that...

Question 11

Because standard deviation is not easy to interpret,Dr.Mottle uses another standard measure that expresses scores on a frequency distribution in terms of a number of standard deviations from the mean.What is Dr.Mottle using?

Accepted Answer

A)  Z-score
B)  X-score
C)  mean score
D)  standard deviation score

Question 12

Statistical significance indicates

Accepted Answer

A)  the probability of finding a relationship in sample data when there is none in the population.
B)  the probability of not finding a relationship in sample data when there is none in the population.
C)  the probability of not finding a relationship in sample data when there is one in the population.
D)  the probability of finding a relationship in sample data when there is one in the population.

Question 13

A type II error

Accepted Answer

A)  is falsely accepting a null hypothesis.
B)  is falsely rejecting a null hypothesis.
C)  is the same as a type I error
D)  None of the above

Question 14

Levels of significance tell a researcher whether a relationship among variables is likely due to chance alone.

Accepted Answer

A) True 
 B)False

Question 15

Multiple Regression Analysis results tell the researcher two things,the percentage of prediction accuracy and

Accepted Answer

A)  length of time to calculate.
B)  standard deviation.
C)  scattergram accuracy.
D)  size and direction of effects.

Question 16

A scattergram reveals three aspects of a bivariate relationship.Which of the following is NOT an aspect?

Accepted Answer

A)  form
B)  frame
C)  direction
D)  precision

Question 17

Why does a researcher assign numbers to variable attributes or categories in each variable?

Accepted Answer

The answer of Why does a researcher assign numbers to...

Question 18

A bivariate table

Accepted Answer

A)  is used infrequently.
B)  works with variables that have 2 - 5 categories and data at nominal or ordinal levels of measurement.
C)  is exactly the same as a scattergram.
D)  uses percentages exclusively.

Question 19

Many naturally occurring phenomena fit the___________curve when data points are plotted.

Accepted Answer

The answer of Many naturally occurring phenomena fit the___________curve when...

Question 20

Inferential statistics uses___________to allow a researcher to test hypotheses,permit inferences from sample to population and to evaluate the strength of relationships among variables.

Accepted Answer

A)  probability theory
B)  levels of significance
C)  multiple regression
D)  statistical significance

Exam 9: Making Sense of the Numbers