Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN: 9780079039897
Author: Carter
Publisher: McGraw Hill
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Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
Topic Video
Question

Country Financial, a financial services company, uses surveys of adults age 18 and older to
determine if personal financial fitness is changing over time (Usa today, April 4, 2012). In
February 2012, a sample of 1000 adults showed 410 indicating that their financial security
was more than fair. In February 2010, a sample of 900 adults showed 315 indicating that
their financial security was more than fair.
a. State the hypotheses that can be used to test for a significant difference between the
population proportions for the two years.
b. What is the sample proportion indicating that their financial security was more than
fair in 2012? In 2010?
c. Conduct the hypothesis test and compute the p-value. At a .05 level of significance,
what is your conclusion?
d. What is the 95% confidence interval estimate of the difference between the two
population proportions?

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