STAT. FOR BEHAVIORAL SCIENCES WEBASSIGN
3rd Edition
ISBN: 9781544317823
Author: PRIVITERA
Publisher: Sage Publications
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Chapter 18.5, Problem 3.4LC
To determine
Find the normal approximation for the Wilcoxon signed-ranks T test at a 0.05 level of significance.
Determine whether to retain or reject the null hypothesis.
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A study of parental empathy for sensitivity cues and baby temperament (higher scores mean more empathy) was performed. Let x1 be a random variable that represents the score of a mother on an empathy test (as regards her baby). Let x2 be the empathy score of a father. A random sample of 38 mothers gave a sample mean of x1 = 69.04. Another random sample of 31 fathers gave x2 = 57.68. Assume that ?1 = 11.27 and ?2 = 11.16
(a) Let ?1 be the population mean of x1 and let ?2 be the population mean of x2. Find a 99% confidence interval for ?1 – ?2. (Round your answers to two decimal places.)
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upper limit=
A study of parental empathy for sensitivity cues and baby temperament (higher scores mean more empathy) was performed. Let x1 be a random variable that represents the score of a mother on an empathy test (as regards her baby). Let x2 be the empathy score of a father. A random sample of 40 mothers gave a sample mean of x1 = 68.36. Another random sample of 36 fathers gave x2 = 57.34. Assume that ?1 = 11.83 and ?2 = 11.72.
(a)Let ?1 be the population mean of x1 and let ?2 be the population mean of x2. Find a 99% confidence interval for ?1 – ?2. (Round your answers to two decimal places.)
lower limit=__
upper limit=__
A researcher did a one-tailed one-sample t-test to test the hypothesis that babies prefer the color blue over the color red. He collected a sample of 26 babies and presented them with a red plastic star and a blue plastic start for 12 seconds. The researcher measured the amount of time each baby spent watching the blue star out of the 12 seconds.
What is µ based on the null hypothesis?
Chapter 18 Solutions
STAT. FOR BEHAVIORAL SCIENCES WEBASSIGN
Ch. 18.1 - Prob. 1.1LCCh. 18.1 - Prob. 1.2LCCh. 18.1 - Prob. 1.3LCCh. 18.3 - Prob. 2.1LCCh. 18.3 - Prob. 2.2LCCh. 18.3 - Prob. 2.3LCCh. 18.3 - Prob. 2.4LCCh. 18.5 - Prob. 3.1LCCh. 18.5 - Prob. 3.2LCCh. 18.5 - Prob. 3.3LC
Ch. 18.5 - Prob. 3.4LCCh. 18.7 - Prob. 4.1LCCh. 18.7 - Prob. 4.2LCCh. 18.7 - Prob. 4.3LCCh. 18.7 - Prob. 4.4LCCh. 18.9 - Prob. 5.1LCCh. 18.9 - Prob. 5.2LCCh. 18.9 - Prob. 5.3LCCh. 18.11 - Prob. 6.1LCCh. 18.11 - Prob. 6.2LCCh. 18.11 - Prob. 6.3LCCh. 18.11 - Prob. 6.4LCCh. 18 - Prob. 1FPCh. 18 - Prob. 2FPCh. 18 - Prob. 3FPCh. 18 - Prob. 4FPCh. 18 - Prob. 5FPCh. 18 - Prob. 6FPCh. 18 - Prob. 7FPCh. 18 - Prob. 8FPCh. 18 - Prob. 9FPCh. 18 - Prob. 10FPCh. 18 - Prob. 11FPCh. 18 - Prob. 12FPCh. 18 - Prob. 13CAPCh. 18 - Prob. 14CAPCh. 18 - Prob. 15CAPCh. 18 - Prob. 16CAPCh. 18 - Prob. 17CAPCh. 18 - Prob. 18CAPCh. 18 - Prob. 19CAPCh. 18 - Prob. 20CAPCh. 18 - Prob. 21CAPCh. 18 - Prob. 22CAPCh. 18 - Prob. 23CAPCh. 18 - Prob. 24CAPCh. 18 - Prob. 25CAPCh. 18 - Prob. 26CAPCh. 18 - Prob. 27CAPCh. 18 - Prob. 28PRCh. 18 - Prob. 29PRCh. 18 - Prob. 30PRCh. 18 - Prob. 31PRCh. 18 - Prob. 32PR
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