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Question - Identity theft. A study of identity theft looked at how well consumers protect themselves from this increasingly prevalent crime. The behaviors of 61 college students were compared with the behaviors of 59 nonstudents. One of the questions was "When asked to create a password, I have used either my mother's maiden name, or my pet's name, or my birth date, or the last four digits of my social security number, or a series of consecutive numbers." For the students, 22 agreed with this statement while 30 of the nonstudents disagreed.
(a) Display the data in a two-way table and perform the chi-square test. Summarize the results.
(b) Reanalyze the data using the methods for comparing two proportions that we studied in Chapter 6. Compare the results and verify that the chi-square statistic is the square of the z statistic.
(c) The students in this study were junior and senior college students from two sections of a course in Internet marketing at a large northeastern university. The nonstudents were a group of individuals who were recruited to attend commercial focus groups on the West Coast conducted by a lifestyle marketing organization. Discuss how the method of selecting the subjects in this study relates to the conclusions that can be drawn from it.
Test the hypothesis that the percentages of the surgical operations that lead to lawsuits are the same for each of the three types. Use the 5 percent level of significance.
computing a linear regression equation to predict the future values of the dependent variable y.1.nbsp the estimators
For each of the following tests concerning the autocorrelation parameter ρ in regression model (12.2) with three predictor variables. state the appropriate decision rule based on the
The manufacturer would like to establish inventory levels such that there is only a five percent chance of running out of stock. Where should the manufacturer set the inventory level?
Westward expansion during 1860-1890. What is a good topic to star with for an essay?
a student wants to assess whether her dog muffin tends to chase her blue ball more often than she chases her red ball.
The average CPI for 1931 was 15.2. The average CPI for 1976 and 2005 can be found in Table 16.1. Use what you learned in this chapter to convert Babe Ruth's.
Provide one example in the accounting department that you can apply a contingency table to. Briefly explain how a contingency table can be useful.
Travel and Transportation In a study of the worldwide commercial jet fleet through 2011, What is the probability that none of the four occurred
You are interested in using linear regression to test whether drinking a protein shake improves weightlifting performance. From a sample of 200 college students, you estimate a linear regression with WEIGHTLIFT as the dependent variable and PROTEI..
to compare commuting times in various locations independent random samples were obtained from the six cities presented
suppose you want to estimate the proportion of people in your community who would choose thin mints as their favorite
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