M2 Quiz

Question 1

The probability that events A and B are independent are calculated as what?

Answer 1

P(A and B) = P(A).P(A|B)

Question 2

In acceptance sampling, usually 100% of the lot is checked. True or False

Answer 2

False

Question 3

An individual can assign the subjective probability of an event based on their previous knowledge of the event. T or F

Answer 3

True

Question 4

The probability of rolling either a 2 or a 3 on a die is an example of conditional probability T or F

Answer 4

False

Question 5

What does the following equal:

6!3!
——-
4!3!

Answer 5

30

Question 6

The probability of rolling either a 2 or a 3 on a die is an example of mutually exclusive events T or F

Answer 6

True

Question 7

What type of variation can be reduced, or even eliminated and is usually non random in nature?

Answer 7

Assignable

Question 8

The joint probability of two independent events is calculated how?

Answer 8

P(A and B) = P(A). P(B)

Question 9

The upper and lower control limits are set usually where in the distribution?

Answer 9

3 standard deviations from the mean

Question 10

To apply the special rule of addition two variables must be mutually exclusive. T or F

Answer 10

True

Question 11

A particular outcome of an experiment is referred to as a sample space. T or F

Answer 11

False

Question 12

A permutation is an arrangement of a set of objects in which there is an order. T or F

Answer 12

True

Question 13

A joint distribution is the likelihood that two events will occur either at the same time or in sequence. T or F

Answer 13

True

Question 14

As a general rule of thumb. If items selected from a sample are not replaced and sample size is less than 5% of the population you use what to solve

Answer 14

The hypergeometric distribution

Question 15

In a normal distribution, the points of the curve meet the x axis at z= -3 and z= 3. T or F

Answer 15

False

Question 16

In a Poisson distribution the probability of success may vary from trial to trial. T or F

Answer 16

False

Question 17

Chances are 50/50 a new born baby will be a girl. What are the chances a family with 5 children will have all girls?

Answer 17

0.031

Question 18

A builder has 5 exterior designs and 3 interior. How many could he match with out repeating?

Answer 18

15

Question 19

The combination formula is

n!/(n-r)!

True or false

Answer 19

False

Question 20

10 rolls of film in a box and 3 are defective. Two rolls are robe selected one after the other. What is the probability both rolls will be defective?

Answer 20

1-15 or 0.07

Question 21

In terms of formula:

Z= x - u / SD

True or false

Answer 21

True

Question 22

Z values to the right of the mean are negative T or F

Answer 22

False

Question 23

In a normal distribution the mean plus or minus 1.96 standard deviations is what percentage of the population?

Answer 23

95%