statistics - due by 3:00 pm

(This does not cover every question on the exam but most of them!)

Basic Probability Chapter 4 Review Exercises (p251): 16

I will send out the answer to this question 16.

#16

a. P(Factory X or Stereo) = P(Factory X) + P(Stereo) – P(both) = 24/104 + 39/104 – 6/104 = 57/104 = .548

b. P(Factory Y or Z) = P(Factory Y) + P(Factory Z) – P(both) = 52/104 + 28/104 – 0/104 = 80/104 = .769

c. P(TV or Z) = P(TV) + P(Factory Z) – P(both) = 65/104 + 28/104 – 15/104 = 78/104 = 0.75

Binomial Probability Chapter 5 Review Exercises (p292): 21 and 22

Answers to #21 can be found in week 5 Assignments, Tests and Quizzes link

I will send out the answer to this question 22.

#22

n = 250

p = .754

q = .246

mean = n*p = 250 * .754 = 188.5

variance = n*p*q = 250*.754*.246 = 46.371

standard deviation = sqrt(46.371) =6.8096

Normal Distribution Chapter 6 Review Exercises (p346): 2

Answers can be found in week 6 Assignments, Tests and Quizzes link

Confidence Interval for a Proportion Chapter 7 Review Exercises (p392): 3, 9

Answers to #3 can be found in week 9 Assignments, Tests and Quizzes link

I will send out the answer to this question 9.

#9

p_hat = 41/75 = .547

E = 1.96 * sqrt(.547 * .453 / 75) = .113

.547 - .113 < p < .547 + .113

= 0.434 < p < .660

Hypothesis Testing Chapter 8 Review Exercises (p459): 2, 5, 10, 12 and 13

Answers can be found in week 10 and week 11 Assignments, Tests and Quizzes link

Tests for the mean for two independent and dependent samples Chapter 9 Review Exercises (p520): 8 and 12

Answers can be found in week 12 Assignments, Tests and Quizzes link

Regression and Correlation Chapter 10 Review Exercises (p565): 2, 4, and 8.

Answers can be found in week 13 Assignments, Tests and Quizzes link

Chi Square tests Chapter 11 Review Exercises (p615): 5, and 8.

Answers can be found in week 14 Assignments, Tests and Quizzes link