Statistics for the Behavioral Sciences
3rd Edition
ISBN: 9781506386256
Author: Gregory J. Privitera
Publisher: SAGE Publications, Inc
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Chapter 2, Problem 14CAP
To determine
Identify the three errors in the simple frequency distribution.
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A common way for two people to settle a frivolous dispute is to play a game of rock-paper-scissors. In this game, each person simultaneously displays a hand signal to indicate a rock, a piece of paper, or a pair of scissors. Rock beats scissors, scissors beats paper, and paper beats rock. If both players select the same hand signal, the game results in a tie.
Two roommates, roommate A and roommate B, are expecting company and are arguing over who should have to wash the dishes before the company arrives. Roommate A suggests a game of rock-paper-scissors to settle the dispute.
Consider the game of rock-paper-scissors to be an experiment. In the long run, roommate A chooses rock 21% of the time, and roommate B chooses rock 61% of the time; roommate A selects paper 39% of the time, and roommate B selects paper 21% of the time; roommate A chooses scissors 40% of the time, and roommate B chooses scissors 18% of the time. (These choices are made randomly and independently of each…
A qualifying exam for a graduate school program has a math section and a verbal section. Students receive a score of 1, 2, or 3 on each section. Define X as a student’s score on the math section and Y as a student’s score on the verbal section. Test scores vary according to the following bivariate probability distribution.
y
1
2
3
1
0.22
0.33
0.05
x
2
0.00
0.08
0.20
3
0.07
0.05
0.00
μXX = , and μYY =
σXX = , and σYY =
The covariance of X and Y is . The coefficient of correlation is . The variables X and Y independent.
The expected value of X + Y is , and the variance of X + Y is .
To be accepted to a particular graduate school program, a student must have a combined score of 4 on the qualifying exam.
What is the probability that a randomly selected exam taker qualifies for the program?
0.45
0.47
0.46
0.33
Chebysheff’s Theorem states that the…
Chapter 2 Solutions
Statistics for the Behavioral Sciences
Ch. 2.2 - Prob. 1.1LCCh. 2.2 - Prob. 1.2LCCh. 2.2 - Prob. 1.3LCCh. 2.2 - Prob. 1.4LCCh. 2.2 - Prob. 1.5LCCh. 2.2 - Prob. 2.1LCCh. 2.2 - Prob. 2.2LCCh. 2.2 - Prob. 2.3LCCh. 2.2 - Prob. 2.4LCCh. 2.2 - Prob. 2.5LC
Ch. 2.2 - Prob. 3.1LCCh. 2.2 - Prob. 3.2LCCh. 2.2 - Prob. 3.3LCCh. 2.2 - Prob. 3.4LCCh. 2.3 - Prob. 4.1LCCh. 2.3 - Prob. 4.2LCCh. 2.3 - Prob. 4.3LCCh. 2.8 - Prob. 5.1LCCh. 2.8 - Prob. 5.2LCCh. 2.8 - Prob. 5.3LCCh. 2.8 - Prob. 5.4LCCh. 2.9 - Prob. 6.1LCCh. 2.9 - Prob. 6.2LCCh. 2.9 - Prob. 6.3LCCh. 2.9 - Prob. 6.4LCCh. 2.9 - Prob. 7.1LCCh. 2.9 - Prob. 7.2LCCh. 2.9 - Prob. 7.3LCCh. 2.10 - Prob. 8.1LCCh. 2.10 - Prob. 8.2LCCh. 2.10 - Prob. 8.3LCCh. 2 - Prob. 1FPCh. 2 - Prob. 2FPCh. 2 - Prob. 3FPCh. 2 - Prob. 4FPCh. 2 - Prob. 5FPCh. 2 - Prob. 6FPCh. 2 - Prob. 7FPCh. 2 - Prob. 8FPCh. 2 - Prob. 9FPCh. 2 - Prob. 10FPCh. 2 - Prob. 11CAPCh. 2 - Prob. 12CAPCh. 2 - Prob. 13CAPCh. 2 - Prob. 14CAPCh. 2 - Prob. 15CAPCh. 2 - Prob. 16CAPCh. 2 - Prob. 17CAPCh. 2 - Prob. 18CAPCh. 2 - Prob. 19CAPCh. 2 - Prob. 20CAPCh. 2 - Prob. 21CAPCh. 2 - Prob. 22CAPCh. 2 - Prob. 23CAPCh. 2 - Prob. 24CAPCh. 2 - Prob. 25CAPCh. 2 - Prob. 26CAPCh. 2 - Prob. 27CAPCh. 2 - Prob. 28CAPCh. 2 - Prob. 29CAPCh. 2 - Prob. 30CAPCh. 2 - Prob. 31CAPCh. 2 - Prob. 32CAPCh. 2 - Prob. 33PRCh. 2 - Prob. 34PRCh. 2 - Prob. 35PRCh. 2 - Prob. 36PRCh. 2 - Prob. 37PRCh. 2 - Prob. 38PR
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