PSY315 Week Two Practice Problems
University of Phoenix Material
Week Two Practice Problems
Prepare a written response to the following questions.
Chapter 2
12. For the following scores, find the mean, median, sum of squared deviations, variance, and standard deviation:
1,112; 1,245; 1,361; 1,372; 1,472
Mean is 1312
Median is 1361
Sum of squared deviations is 76089.2
Variance is 15218
Standard deviation is 123.361
16. A psychologist interested in political behavior measured the square footage of the desks in the official office for four U.S. governors and of four chief executive officers (CEOs) of major U.S. corporations. The figures for the governors were 44, 36, 52, and 40 square feet. The figures for the CEOs were 32, 60, 48, 36 square feet.
a. Figure the means and standard deviations for the governors and CEOs.
Governors: Mean 43, Standard deviation 6.83
CEOs: Mean 44, Standard deviation 12.65
b. Explain, to a person who has never had a course in statistics, what you have done.
What you do is find the spread of data and the average measurements of the desks for both the CEO’s and the governors.
c. Note the waus in which the means and standard deviations differ, and speculate on the possible meaning of these differences, presuming that they are representative of U.S. governors and large corporations’ CEOs in general.
The means in both cases are the same. The range for the CEO’s is double the size of the governors measurments speculating that they have larger desk while the others desk were measured much smaller. 21. Radel and colleagues (2011) conducted a study of how feeling overly controlled makes you desire—even unconsciously—more freedom. In their study, 52 Canadian undergraduates played a video game in a laboratory and were randomly assigned to either:
a. an automony deprivation condition, in which they were told to follow instructions precisely, constantly given instructions over a loudspeaker, and carefully observed on everything they
Week Two Practice Problems
Prepare a written response to the following questions.
Chapter 2
12. For the following scores, find the mean, median, sum of squared deviations, variance, and standard deviation:
1,112; 1,245; 1,361; 1,372; 1,472
Mean is 1312
Median is 1361
Sum of squared deviations is 76089.2
Variance is 15218
Standard deviation is 123.361
16. A psychologist interested in political behavior measured the square footage of the desks in the official office for four U.S. governors and of four chief executive officers (CEOs) of major U.S. corporations. The figures for the governors were 44, 36, 52, and 40 square feet. The figures for the CEOs were 32, 60, 48, 36 square feet.
a. Figure the means and standard deviations for the governors and CEOs.
Governors: Mean 43, Standard deviation 6.83
CEOs: Mean 44, Standard deviation 12.65
b. Explain, to a person who has never had a course in statistics, what you have done.
What you do is find the spread of data and the average measurements of the desks for both the CEO’s and the governors.
c. Note the waus in which the means and standard deviations differ, and speculate on the possible meaning of these differences, presuming that they are representative of U.S. governors and large corporations’ CEOs in general.
The means in both cases are the same. The range for the CEO’s is double the size of the governors measurments speculating that they have larger desk while the others desk were measured much smaller. 21. Radel and colleagues (2011) conducted a study of how feeling overly controlled makes you desire—even unconsciously—more freedom. In their study, 52 Canadian undergraduates played a video game in a laboratory and were randomly assigned to either:
a. an automony deprivation condition, in which they were told to follow instructions precisely, constantly given instructions over a loudspeaker, and carefully observed on everything they
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