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A researcher is interested in finding out if college-bound high school students tend to smoke cigarettes less than high school students who are not college bound. He distributes a questionnaire and finds that for a group of 57 college-bound students the mean number of cigarettes smoked per week is 4.0, with a standard deviation of 2.0. For 36 non college-bound students, he finds that the mean number of cigarettes smoker per week is 9.0, with a standard deviation of 3.0. Using these results, test the null hypothesis of no difference between college-bound and non-college bound high school students with respect to smoking. What does the outcome of this test indicate?
multiple regression predicts a single dependent variable y from two or more independent x variables.mlr is a
What does this theorem allow you to do that traditional statistics do not? What are some prerequisites for using Bayesian statistics?
The so-called "Gambler's Fallacy" makes the mistake of not recognizing:
What are examples in which regression analysis is used for forecasting? What are some primary and secondary sources of data that may be used in correlation and regression analysis?
a company that sells an online course aimed at helping high-school students improve their sat scores has claimed that
Test research hypotheses that there is a difference in level of education between liberals and conservatives, set alpha at .01. Would your decision have been different if alpha were set at .05?
dartis company is considering investing in a specialized equipment costing 600000. the equipment has a useful life of 5
What is the probability that if you randomly select a student on campus, this is student is male OR majoring in business?
in an article about the cost of health care money magazine reported that a visit to a hospital emergency room for
A consumer protection group is concerned that a ketchup manufacturer is filling its 20-ounce family-size containers with less than 20 ounces of ketchup.
give the coefficient of xk in the expansion of x 1x99 where k is an integer between 0 and 99 inclusive. give
Find the minimum sample size required for estimating the overall proportion of students who passed Exam P in 2009 to within 4% with 95% confidence if it is known that this proportion is between 30% and 40%.
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