Essential Statistics for the Behavioral Sciences
2nd Edition
ISBN: 9781506386300
Author: Gregory J. Privitera
Publisher: SAGE Publications, Inc
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Chapter 3, Problem 25CAP
To determine
To calculate:
The correct mean from the given data.
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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 3 Solutions
Essential Statistics for the Behavioral Sciences
Ch. 3 - Prob. 1FPCh. 3 - Prob. 2FPCh. 3 - Prob. 3FPCh. 3 - Prob. 4FPCh. 3 - Prob. 5FPCh. 3 - Prob. 6FPCh. 3 - Prob. 7FPCh. 3 - Prob. 8FPCh. 3 - Prob. 9FPCh. 3 - Prob. 10FP
Ch. 3 - Prob. 11CAPCh. 3 - Prob. 12CAPCh. 3 - Prob. 13CAPCh. 3 - Prob. 14CAPCh. 3 - Prob. 15CAPCh. 3 - Prob. 16CAPCh. 3 - Prob. 17CAPCh. 3 - Prob. 18CAPCh. 3 - Prob. 19CAPCh. 3 - Prob. 20CAPCh. 3 - Prob. 21CAPCh. 3 - Prob. 22CAPCh. 3 - Prob. 23CAPCh. 3 - Prob. 24CAPCh. 3 - Prob. 25CAPCh. 3 - Prob. 26CAPCh. 3 - Prob. 27CAPCh. 3 - Prob. 28CAPCh. 3 - Prob. 29PRCh. 3 - Prob. 30PRCh. 3 - Prob. 31PRCh. 3 - Prob. 32PRCh. 3 - Prob. 33PR
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