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Consider the following news headline, "Cigarette Smokers Make Lower College Grades than Nonsmokers" The news article goes on to say that researchers at a university collected information on rate of cigarette smoking (total number of cigarettes smoked in a one month period) and the college student's current GPA for completed college courses. They found that those with higher levels of cigarette use had lower GPAs, and vice versa. What can you rightfully conclude from this? Why? Be specific about what this kind of information may indicate and mean.
Find out the mean, median and mode for the given data
Katie is studying aggression among adolescent girls. She believes that there is a relationship between the level of interaction a girl has with her mother and her level of aggression.
To find weighted aggregate price index using Laspeyres and Paasche method.
You own a stock called Insurate, Inc. Your profit for the stock is a random variable (W) with mean 1,000 and variance 400. You would like to buy more stock and you are trying to decide between Insurate
According to Advertising Age, average base salary for women working as copywriters in advertising firms is higher than average base salary for men. The average base salary for women is $67,000 and the average base salary for men is $65,500 (Workin..
A permutation resample for a two-sample test
Risks and Odds in Everyday Life, James Burke claims that about 70 percent of all single men would welcome a woman taking the initiative in asking for a date. A random sample of 20 single men was asked if they would welcome a woman taking the initiati..
Recognize the kind of sampling (random, systematic, convenience, stratified, cluster) employed whenever a sample of people who smoke is obtained as explained below.
Based on the data, determine the 95 percent confidence interval evaluate for true population mean?
You run a two tail t-test. The critical value for this test at the .05 level is a t of 7.82. What value must the obtained t-test statistic be in order to be considered significant at the .05 level?
What is the difference between dependent and independent samples? Discuss differences is statistical treatment, statistical power, and data management.
Test the hypothesis that the annual incomes of corporate trainers in areas of more than 500,000 are significantly more than those in areas of less than 100,000.
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