Devry Math 221 Final Exam - Latest 2015

DeVry MATH 221 Final Exam - Latest 2015

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1. DeVry MATH 221 Final Exam - Latest

2.

3. 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).

• Find the probability that the student is male or a nursing major.

P (being male or being nursing major) = 0.513

• Find the probability that the student is female or not a nursing major.

P(being female or not being a nursing major) = 0.972

• Find the probability that the student is not female or a nursing major

P(not being female or not being a nursing major) = 0.513

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

Answer: No, because there are 99 males majoring in nursing.

Hint:

(a) P (male or a nursing major) = P (male) + P (nursing major) – P (male AND a nursing major)

= (1115/3539) + (799/3539) – (99/3539)

= 0.513

(b) P (female or not a nursing major) = P (female) + P (not a nursing major) – P (female AND not a nursing major)

= (2424/3539) + (2740/3539) – (1724/3539)

= 0.972

(c) P (not female or a nursing major) = P (not female) + P (nursing major) – P (not female AND a nursing major)

= (1115/3539) + (799/3539) – (99/3539)

= 0.513

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

• Write the claim mathematically...