Individual Assignments from the Text
11. For the following scores, find the (a) mean, (b) median, (c) sum of squared deviations, (d) variance, and (e) standard deviation:
2, 2, 0, 5, 1, 4, 1, 3, 0, 0, 1, 4, 4, 0, 1, 4, 3, 4, 2, 1, 0
Answer:
A) Mean = 2
B) Median = 2
C) Sum of squared deviations =-52
D). Variance = -2.47
E). Standard deviation = 1.57
12. For the following scores, find the (a) mean, (b) median, (c) sum of squared deviations, (d) variance, and (e) standard deviation:
1,112; 1,245; 1,361; 1,372; 1,472
Answer:
A) Mean = 1.361
B) Median = 1.3124
C) Sum of squared deviations = 0.07608920.0190223
D). Variance = 0.0190223
E). Standard deviation =0.1379213544
13. For the following scores, find the (a) mean, (b) median, (c) sum of squared deviations, (d) variance, and (e) standard deviation:
3.0, 3.4, 2.6, 3.3, 3.5, 3.2
Answer:
A). Mean = 3.16667
B). Median = 3.25
D). Variance = (0.32660)^2 = 0.10667
E). Standard deviation = 0.32660
16. A psychologist interested in political behavior measured the square footage of the desks in the official office of 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, and 36 square feet. (a) Figure the means and standard deviations for the governors and for the CEOs. (b) Explain, to a person who has never had a course in statistics, what you have done. (c) Note the ways 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.
Answer:
The figures for the governors were 44, 36, 52, and 40 square feet.
Gov 's mean = 43 ; std = 6.83
The figures for the CEOs were 32, 60, 48, and 36 square feet.
CEO 's mean = 44 ; std = 12.65
(a) Figure the means and standard deviations for the governors and for the
CEO 's mean = 44 ; std = 12.65
2, 2, 0, 5, 1, 4, 1, 3, 0, 0, 1, 4, 4, 0, 1, 4, 3, 4, 2, 1, 0
Answer:
A) Mean = 2
B) Median = 2
C) Sum of squared deviations =-52
D). Variance = -2.47
E). Standard deviation = 1.57
12. For the following scores, find the (a) mean, (b) median, (c) sum of squared deviations, (d) variance, and (e) standard deviation:
1,112; 1,245; 1,361; 1,372; 1,472
Answer:
A) Mean = 1.361
B) Median = 1.3124
C) Sum of squared deviations = 0.07608920.0190223
D). Variance = 0.0190223
E). Standard deviation =0.1379213544
13. For the following scores, find the (a) mean, (b) median, (c) sum of squared deviations, (d) variance, and (e) standard deviation:
3.0, 3.4, 2.6, 3.3, 3.5, 3.2
Answer:
A). Mean = 3.16667
B). Median = 3.25
D). Variance = (0.32660)^2 = 0.10667
E). Standard deviation = 0.32660
16. A psychologist interested in political behavior measured the square footage of the desks in the official office of 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, and 36 square feet. (a) Figure the means and standard deviations for the governors and for the CEOs. (b) Explain, to a person who has never had a course in statistics, what you have done. (c) Note the ways 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.
Answer:
The figures for the governors were 44, 36, 52, and 40 square feet.
Gov 's mean = 43 ; std = 6.83
The figures for the CEOs were 32, 60, 48, and 36 square feet.
CEO 's mean = 44 ; std = 12.65
(a) Figure the means and standard deviations for the governors and for the
CEO 's mean = 44 ; std = 12.65