Answered: ten years ago 53% of american families…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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ten years ago 53% of american families owned stocks or stock funds. Sample data collected by the investment company institute indicate that the percentage is now 46% (the
Wall Street Journal, october 5, 2012).
a. develop appropriate hypotheses such that rejection of h0 will support the conclusion
that a smaller proportion of american families own stocks or stock funds in 2012 than
10 years ago.
b. assume the investment company institute sampled 300 american families to estimate
that the percent owning stocks or stock funds was 46% in 2012. what is the p-value
for your hypothesis test?
c. at a 5 .01, what is your conclusion?

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