Question

Math 110 Test A Marie Chalce inseachta 30 mints 1. The random variable of bere in your boot wobec A B) continuous dat discrete data 2. The random variable of Area under the Standard Normal Curwe would be c o d A continuous data B) discrete data Assume we have met the requirements for a probability Distribution. Using the information below. Find the probability that was 8. P(x) 0.01 021 A) B) C) D) E) 0.30 0.21 0.52 0.48 None of these 4. Assume we have met the requirements for a Probability Distribution. Using the information below, find the probability that x less than 8 (meaning 2, 5 or 6). P(x) 0.01 0.48 0.21 A) B) C) D) E) 0.51 0.48 0.30 0.70 0.49 You have a Binomial Random Variable Distribution situation. In a recent survey, 80% of the community is in favor of a new park. If 15 citizens are chosen at random, what is the population mean for those favoring the new park? A) B) C) D) E) 1.55 2.40 12 0.8 0.2 6. You absolutely must have a sample size n > 30 to have a 'normal' data distribution. A) B) True False

Answer 1

1) discrete

Because number of pages in a book is countable.thus,it is discrete

2) continuous

Area under normal curve is continuous variable

3) Sum of all probability value should equal to one

Σ P(x) = 1

P(2) + P(5) + P(6) + P(8) = 1

0.01 + 0.48 + 0.21 + P(8) = 1

P(8) = 1 - 0.70

P(8) = 0.30

4)

P(X < 8)

= P(x = 2) + P(x = 5) + P(x = 6)

= 0.01 + 0.48 + 0.21

= 0.70

5)

p = 0.8

n = 15

Population mean for those favouring the new park

= 0.8 * 15

= 12

6)

False

Sample size n  ≥ 30 for normal data distribution