Math 221 Final Exam Statistics for Decision

MATH 221 Final Exam Statistics for Decision

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MATH 221 Final Exam with ALL Formulas DeVry. ALL Answers are 100% Correct.

This exam includes formulas in Word and in Excel, which can be used if numeric data is different from the one listed below.

1. The table below shows the number of male and female students enrolled in nursing at a university for a certain semester. A student is selected at random. Complete parts (a) through (d) (a)Find the probability that the student is male or a nursing major.

P (being male or being nursing major) =

(b) Find the probability that the student is female or not a nursing major.

P(being female or not being a nursing major) =

(c) Find the probability that the student is not female or a nursing major

P(not being female or not being a nursing major) =

(d) Are the events “being male” and “being a nursing major” mutually exclusive? Explain.

2. An employment information service claims the mean annual pay for full-time male workers over age 25 without a high school diploma is $22,325. The annual pay for a random sample of 10 full-time male workers over age 25 without a high school diploma is listed. At a = 0.10, test the claim that the mean salary is $22,325. Assume the population is normally distributed.

20,660 – 21,134 – 22,359 – 21,398 – 22,974, – 16,919 – 19,152 – 23,193 – 24,181 – 26,281

(a) Write the claim mathematically and identify

Which of the following correctly states ?

(b) Find the critical value(s) and identify the rejection region(s).

What are the critical values?

Which of the following graphs best depicts the rejection region for this problem?

(c) Find the standardized test statistics.

t =

(d) Decide whether to reject or fail to reject the null hypothesis.

reject because the test statistics is in the rejection region.

a. fail to reject because the test statistic is not in the rejection region.

c. reject...