Question 1

A researcher measures the number of times each of six rats has to run a maze before it masters the maze. The number of times recorded for each rat is 2, 3, 3, 4, 5, 7. In this example, the ____.

Accepted Answer

A)  mean is smaller than the median
B)  median is larger than the mode
C)  mean is larger than the range
D)  mode is larger than the range B

Question 2

Batina is a conservative investor, much to the chagrin of her husband. He cannot believe she values stability in an investment over the historical rate of return. The standard deviations of the following returns of investment are given below. Which investment should Batina choose?

Accepted Answer

A)  1.23
B)  0.98
C)  2.21
D)  1.91 B

Question 3

Professor Kipling is discussing statistics in your introductory psychology class. She explains that descriptive statistics are invaluable because they allow psychologists to ____.

Accepted Answer

A)  describe the relationship between two variables
B)  summarize a pool of data
C)  determine whether a data set is normally distributed
D)  determine whether the differences between two groups are significant B

Question 4

If your research study had more than two experimental/control groups and encompassed more than one independent variable, you would have to use a(n)____ to determine the differences between the groups.

Accepted Answer

A)  chi-squared test
B)  analysis of variance
C)  t test
D)  correlation coefficient

Question 5

Descriptive statistics will allow you to compute ____.

Accepted Answer

A)  a t-test
B)  central tendency
C)  the likelihood that results came about by chance
D)  analysis of variance

Question 6

Fiona, a quantitative psychologist, is interested in using inferential statistics because they provide ____.

Accepted Answer

A)  a measure of how likely it is that a result came about by chance
B)  a correlation between the dependent variable and the independent variable
C)  information about the variability of the data
D)  a summarization of a pool of data

Question 7

To calculate the mean of a set of data, you add up all the scores and divide the result by the ____.

Accepted Answer

A)  range
B)  standard deviation
C)  number of scores
D)  mode

Question 8

What does it mean if the standard deviation of a distribution of quiz grades is 0?

Accepted Answer

A)  An equal number of people received each grade (A, B, C, D, and 
E)  .
B)  The distribution is a normal, bell-shaped curve.
C)  Everyone in the class received the same grade or score.
D)  Everyone in the class received a different grade.

Question 9

Eunice is a new elementary school principal. One of her first projects is to determine whether students have been appropriately assigned to either the Sparrow, Blue Jay, or Robin reading groups. She administers the Miller Reading Ability Test (MRAT)to all three groups. What statistical analysis should Eunice use to compare the means of the three groups?

Accepted Answer

A)  analysis of variance
B)  correlational analysis
C)  standard deviation
D)  t test

Question 10

Dr. Yodela wants to find out whether there is a significant difference in the mean scores of two groups on his new intelligence test. Which statistic should Dr. Yodela use?

Accepted Answer

A)  The median
B)  A correlation
C)  An analysis of variance
D)  A t test

Question 11

The mean is ____.

Accepted Answer

A)  the difference between the highest and lowest scores
B)  the arithmetic average
C)  one-half of the range
D)  the most frequent score

Question 12

Your instructor comes to class with the results of the last quiz. She tells you that the average score was 7 (out of a possible 10)and that the median was 6. These are measures of ____.

Accepted Answer

A)  dispersion
B)  central tendency
C)  variance
D)  range

Question 13

Consider the following data set: 2, 2, 3, 3, 3, 4, 4, 5, 5, 92. If the last value (92)is removed from the data set, which statistical measure will change the most?

Accepted Answer

A)  only the mode
B)  only the mean
C)  the median
D)  the mode and the mean

Question 14

In a normal distribution of scores, which of the following is true?

Accepted Answer

A)  About 5 percent of the scores are more than two standard deviations from the mean.
B)  The mean score is always 0.
C)  Most scores are located in the two "tails" at either end of the distribution.
D)  The standard deviation indicates the arithmetic average score.

Question 15

Alejandra is interested in describing the spread of the scores in her data set. She should calculate the ____ of the data set. ​

Accepted Answer

A)  mean
B)  range
C)  correlation
D)  mode

Question 16

Renata runs a study looking at the drinking habits of undergraduates, and suspects the results would show that the amount a student drank will be related to his or her grade-point average (GPA). Instead, she finds that drinking habits (amount of drinks per week)are not related to GPA. This means that ____.

Accepted Answer

A)  Renata's hypothesis is true
B)  there is a negative correlation between alcohol consumption and GPA
C)  there is a positive correlation between alcohol consumption and GPA
D)  the null hypothesis is supported

Question 17

Joe has collected data on the number of hours ten-year-olds spend watching television each week. He tells you that the distribution of scores followed a truly normal curve. Which of the following is suggested by Joe's statement?

Accepted Answer

A)  Fifty percent of the scores fall below the mean.
B)  The mean, median, and mode are all different.
C)  Sixty percent of the scores fall within one standard deviation above and below the mean.
D)  Ten percent of the scores fall two standard deviations above the mean.

Question 18

Your friend places 11 numbers into a hat without showing you what those numbers are. He tells you he will give you $10 if you can guess the exact number that he will randomly pick out of the hat. He says that the mean of the numbers is 5, the median is 6, and the mode is 8. What would your best guess be?

Accepted Answer

A)  5
B)  6
C)  8
D)  Any random number between 1 and 11; knowing the statistics won't help

Question 19

Clint has learned his standard score on a standardized achievement test is -1 (minus one). What percentage of test takers performed better than Clint?

Accepted Answer

A)  84 percent
B)  16 percent
C)  50 percent
D)  95 percent

Question 20

Which of the following is one of the basic categories of descriptive statistics?

Accepted Answer

A)  measures of central tendency
B)  inferring causation
C)  expressing the difference between two group means
D)  predicting proportions in a population

Exam 19: Statistics in Psychological Research

A researcher measures the number of times each of six rats has to run a maze before it masters the maze. The number of times recorded for each rat is 2, 3, 3, 4, 5, 7. In this example, the ____.

Batina is a conservative investor, much to the chagrin of her husband. He cannot believe she values stability in an investment over the historical rate of return. The standard deviations of the following returns of investment are given below. Which investment should Batina choose?

Professor Kipling is discussing statistics in your introductory psychology class. She explains that descriptive statistics are invaluable because they allow psychologists to ____.

If your research study had more than two experimental/control groups and encompassed more than one independent variable, you would have to use a(n) ____ to determine the differences between the groups.

Descriptive statistics will allow you to compute ____.

Fiona, a quantitative psychologist, is interested in using inferential statistics because they provide ____.

To calculate the mean of a set of data, you add up all the scores and divide the result by the ____.

What does it mean if the standard deviation of a distribution of quiz grades is 0?

Dr. Yodela wants to find out whether there is a significant difference in the mean scores of two groups on his new intelligence test. Which statistic should Dr. Yodela use?

The mean is ____.

Your instructor comes to class with the results of the last quiz. She tells you that the average score was 7 (out of a possible 10) and that the median was 6. These are measures of ____.

Consider the following data set: 2, 2, 3, 3, 3, 4, 4, 5, 5, 92. If the last value (92) is removed from the data set, which statistical measure will change the most?

In a normal distribution of scores, which of the following is true?

Alejandra is interested in describing the spread of the scores in her data set. She should calculate the ____ of the data set.

Joe has collected data on the number of hours ten-year-olds spend watching television each week. He tells you that the distribution of scores followed a truly normal curve. Which of the following is suggested by Joe's statement?

Clint has learned his standard score on a standardized achievement test is -1 (minus one) . What percentage of test takers performed better than Clint?

Which of the following is one of the basic categories of descriptive statistics?

Exam 19: Statistics in Psychological Research

A researcher measures the number of times each of six rats has to run a maze before it masters the maze. The number of times recorded for each rat is 2, 3, 3, 4, 5, 7. In this example, the ____.

Batina is a conservative investor, much to the chagrin of her husband. He cannot believe she values stability in an investment over the historical rate of return. The standard deviations of the following returns of investment are given below. Which investment should Batina choose?

Professor Kipling is discussing statistics in your introductory psychology class. She explains that descriptive statistics are invaluable because they allow psychologists to ____.

If your research study had more than two experimental/control groups and encompassed more than one independent variable, you would have to use a(n) ____ to determine the differences between the groups.

Descriptive statistics will allow you to compute ____.

Fiona, a quantitative psychologist, is interested in using inferential statistics because they provide ____.

To calculate the mean of a set of data, you add up all the scores and divide the result by the ____.

What does it mean if the standard deviation of a distribution of quiz grades is 0?

Dr. Yodela wants to find out whether there is a significant difference in the mean scores of two groups on his new intelligence test. Which statistic should Dr. Yodela use?

The mean is ____.

Your instructor comes to class with the results of the last quiz. She tells you that the average score was 7 (out of a possible 10) and that the median was 6. These are measures of ____.

Consider the following data set: 2, 2, 3, 3, 3, 4, 4, 5, 5, 92. If the last value (92) is removed from the data set, which statistical measure will change the most?

In a normal distribution of scores, which of the following is true?

Alejandra is interested in describing the spread of the scores in her data set. She should calculate the ____ of the data set. ​

Joe has collected data on the number of hours ten-year-olds spend watching television each week. He tells you that the distribution of scores followed a truly normal curve. Which of the following is suggested by Joe's statement?

Clint has learned his standard score on a standardized achievement test is -1 (minus one) . What percentage of test takers performed better than Clint?

Which of the following is one of the basic categories of descriptive statistics?

Alejandra is interested in describing the spread of the scores in her data set. She should calculate the ____ of the data set.