Sony would like to test the hypothesis that the standard deviation for the age of PlayStation users is higher than the standard deviation for the age of Xbox users. The following table summarizes sample statistics from each population.
PlayStation XboxSample standard deviation 4.3 years 3.9 yearsSample size 25 28The test statistic for this hypothesis test would be ________.A) 1.03
B) 1.10
C) 1.22
D) 3.65
Question 2
Recent survey data indicated that 14.2 of adults between the ages of 25 and 34 live with their parents. A random sample of 125 young adults in this age group was selected.
What is the probability that between 13 and 17 of these young adults lived with their parents?A) 0.1808
B) 0.2620
C) 0.3505
D) 0.3135
The Normal Distribution of Scores for a Standardized Intelligence Test
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