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Teen smoking II. Suppose that, as reported by the Centers for Disease Control, about 30% of high school students smoke tobacco. You randomly select 120 high school students to survey them on their attitudes toward scenes of smoking in the movies.
a) What's the expected number of smokers?
b) What's the standard deviation of the number of smokers?
c) The number of smokers among 120 randomly selected students will vary from group to group. Explain why that number can be described with a Normal model.
d) Using the 68 - 95 - 99.7 Rule, create and interpret a model for the number of smokers among your group of 120 students.
Formulate null and alternative hypothesis to test for no difference between the population mean credit card charges for groceries and the population mean card charges for dining out.
Binge sample. After hearing of the national result that 44% of students engage in binge drinking (5 drinks at a sitting for men, 4 for women).
In problem, suppose the confidence interval contained the value 0.00. How could the banker's attorney use this information to defend his client?
Determine whether the following are demonstrative definitions, enumerative definitions, definitions by subclass, synonymous definitions, etymological definitions, operational definitions, or definitions by genus and difference.
Determine whether the following equations real or complex solutions; justify your answer. Note: It is not necessary to find the solutions; just determine if they are real or complex and explain why.
A high school counselor is interested in the percentage of students who will be going to college. She randomly picks 60 students and finds that 53 will be going to college. Use a 95% confidence level to find the population proportion.
Draw on the materials from your Quantitative Research Methods for Professionals in Education and Other Fields and Discovering Statistics Using IBM SPSS Statistics texts, avoiding the problems richly cited in the Lavrakas, Mane, and Laszlo's 2010 a..
Cosmopolitan magazine (Cosmo as it's known popularly) publishes many of its well-known quizzes on its Web site. One quiz, aimed at heterosexual women.
Define public service culture and explain if public service motives are exclusive to the public sector.
Verify that this gambling interpretation leads to the correct answer for all starting states in the examples that you worked in Exercise 28.
Find the mean and standard deviation of the difference in price of a ticket to China and a ticket to France.- Do you need to make any assumptions in calculating these means? How about the standard deviations?
Is this statistically significant evidence that the candidate has enough valid signatures overall? Explain.
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