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A recent study, "[b]ased on data from a survey of nearly 1,500 Boston men aged 18 to 35 years...found that 16 percent of the men - about one in six -- said they had abused their partner physically or sexually within the past year. Of those who admitted to recent abuse, 38 percent said they had bullied their peers frequently in school. That compared to only 12 percent of the men who hadn't maltreated their partner as adults" ("School Yard Bullies More Likely to Abuse Partners," 2011, June 6). The study concluded, after eliminating other variables such as child abuse, that "frequent bullying as a kid was linked to a four-fold increase in a man's risk for partner abuse" ("School Yard Bullies More Likely to Abuse Partners," 2011, June 6). Discuss this study. Is the result plausible?
The numbers of years served by selected past members of the U.S. Supreme Court is listed below. Find the percentile rank for each value. Which value corresponds to the 40th percentile? Construct a boxplot for the data and comment on their shape.
Using the .05 level of significance: a) Is there a difference among types of gasoline? b) Is there a difference in the cars?
We have a deck of 52 playing cards. What is the probability of drawing?
Which statement about re-expressing data is not true? I. Unimodal distributions that are skewed to the right will be made more symmetric by taking the square root of the variable.
Assume a business researcherwishes to test hypothesis that greater proportion of marketing managers keep track of such obligations.
Individual loss amounts (ground up) this year follow an inverse Weibull distribution with τ= 3 and expected value 1000. Next year you con?fidently expect loss amounts to in?ate by 10% uniformly across the board.
What is the probability that the first and the last ones on the EP are the relationship songs?
Under what circumatances do you use a one-sided confidence interval instead of a 2 sided confidence interval?
Draw a tree diagram representing this experiment. Use this tree diagram to find the probabilities below.
Find out the test statistic s and its two-sided P -value. Do data give good evidence that population mean is not zero?
What is an interaction? Describe an example and identify the variables within your population (work, social, academic, etc.) for which you might expect interactions?
A psychologist has to develop a new test of spatial perception, and she wants to estimate the mean score achieved by male pilots. How many people must she test if she wants the sample mean to be in error by no more than 2.0 points, with 95% confid..
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