Question 1

A bar graph is used for ______ data

Accepted Answer

A)  categorical 
B)  quantitative 
C)  continuous 
D)  None of these. Bar graphs are never used in psychology.

Question 2

Predicting the value of one variable from another is called a

Accepted Answer

A)  Correlation 
B)  Regression 
C)  Chi-square 
D)  t-test

Question 3

Error bars can be misleading when

Accepted Answer

A)  data are normally distributed 
B)  data are skewed 
C)  different groups have different amounts of variability 
D)  Both a and c are true.

Question 4

The range

Accepted Answer

A)  Is an inferential statistic 
B)  Is highly stable 
C)  Depends completely on the two extreme scores 
D)  Measures central tendency

Question 5

Outliers are

Accepted Answer

A)  impossible values 
B)  extreme but not impossible values 
C)  data that don't fit your theory 
D)  any of these

Question 6

Data reduction is

Accepted Answer

A)  recording data onto individual data sheets 
B)  transcribing data from individual data sheets to a summary form 
C)  performing statistical analysis 
D)  All of these are true.

Question 7

Vertical lines that indicate plus or minus 1 standard deviation of the data on a graph are

Accepted Answer

A)  Error bars 
B)  Skewed distributions 
C)  Median splits 
D)  part of Box and Whisker plots

Question 8

Which of the following steps should you carry out first in data handling?

Accepted Answer

A)  Perform inferential statistics 
B)  Describe the data numerically, with descriptive statistics 
C)  Describe the data graphically 
D)  Check for invalid data

Question 9

Before inferential statistics are performed, you should

Accepted Answer

A)  Calculate descriptive statistics 
B)  Represent the data in a table 
C)  Represent the data in a graph 
D)  All of the above

Question 10

Which one of the following would be best for conveying the shape of the frequency distribution of 250 test scores?

Accepted Answer

A)  histogram 
B)  rank-order distribution 
C)  cumulative frequency distribution 
D)  ungrouped frequency distribution

Question 11

Each data point on a scattergram represents

Accepted Answer

A)  an individual's score on the dependent variable 
B)  an individual's score on two variables 
C)  the relationship between a dependent an independent variable 
D)  None of these are true.

Question 12

Which measure of variability is probably best when the data is skewed?

Accepted Answer

A)  Variance 
B)  Range 
C)  Standard deviation 
D)  Interquartile range

Question 13

Percentiles can be determined directly from a________

Accepted Answer

A)  scattergram 
B)  bar graph 
C)  frequency distribution 
D)  cumulative frequency distribution

Question 14

Which one of the following graphs would be used as a preliminary step in correlational analysis?

Accepted Answer

A)  bar graph 
B)  scattergram 
C)  line graph 
D)  frequency distribution graph

Question 15

Discuss the advantages and disadvantages of having error bars on a graph.

Accepted Answer

The answer of Discuss the advantages and disadvantages of having...

Question 16

In data reduction

Accepted Answer

A)  Raw data are put into a form that is useful for statistical analysis 
B)  The descriptive statistics are calculated 
C)  An analysis is performed on the data to manage excessive data 
D)  Data is recorded onto data sheets

Question 17

NY State's new Governor is worried about the IQ of the people on his staff. He has his Lt. Governor administer a 10-item IQ test to his closest staff members. The scores were 9,9,8,8,5,5,3,1,1,1. Make a frequency table from the data that Lt. Governor collected from the staff members.

Accepted Answer

The answer of NY State's new Governor is worried about...

Question 18

A graphic that uses a dot to represent the frequency of each score and connects those points with a straight line is called a

Accepted Answer

A)  histogram 
B)  scattergram 
C)  frequency polygon 
D)  skewed distribution

Question 19

List some of the relevant information that might be found in a coding guide for an experiment that investigated the effects of attractiveness on jurors' guilty verdicts.

Accepted Answer

The answer of List some of the relevant information that...

Exam 14: Data Exploration, Part 1: Graphic and Descriptive Techniques