STATS AND PROB 3rd QUARTER EXAM REVIEW

Question 1

X is a random variable defined by the number of heads in three tosses of a coin. What are the values of x?

Accepted Answer

X=0,1,2,3

Question 2

The scores on a standardized test are normally distributed with a mean of 60 and a standard deviation of 15.

Accepted Answer

5

Question 3

Compute the Mean, Variance, and Standard deviation from the given table below:

Accepted Answer

SOLVE, SOLVE, SOLVE

Question 4

What is the variance?

Accepted Answer

0.83

Question 5

The probabilities that a printer produces 0,1,2, and 3 misprints are 42%, 28%, 18%, and 12% respectively. FInd the mean.

Accepted Answer

1

Question 6

Suppose you tossed two coins. What are the possible outcomes?

Accepted Answer

HH, HT, TH, TT

Question 7

Which of the following random variables is continuous?

Accepted Answer

The amount of time it takes to finish a book

Question 8

What is P(1)?

Accepted Answer

\frac{2}{15}

Question 9

Which the following is discrete random variable?

Accepted Answer

Camille

Question 10

You flip a coin thrice. What is the probability of getting 2 heads?

Accepted Answer

\frac{3}{8}

Question 11

Which of the following is a variable whose value is obtained by measuring?

Accepted Answer

Continuous

Question 12

TRUE OR FALSE. A random variable can be discrete or continuous.

Accepted Answer

True

Question 13

TRUE OR FALSE. Probability is a set of all possible outcomes.

Accepted Answer

False

Question 14

Suppose you tossed two coins. What the possible values of the random variable for the number of heads??

Accepted Answer

0, 1, 2

Question 15

You flip a coin thrice. What is the probability of getting no heads?

Accepted Answer

1/8

Question 16

How can you determine if a table shows a probability mass function?

Accepted Answer

Both A and B

Question 17

How many outcomes are there in rolling a die?

Accepted Answer

6

Question 18

What is the sum of all the probabilities of all the events in a discrete probability distribution?

Accepted Answer

1

Question 19

What is the formula in solving the variance?

Accepted Answer

σ^2=\sum_{ }^{ }〖〖(X-μ)〗^2∙P(X)〗

Question 20

It is a table showing all possible values of a discrete random variable, together with their probabilities.

Accepted Answer

Discete Probability Distribution

Question 21

What is the σ?

Accepted Answer

0.91

Question 22

What is the mean?

Accepted Answer

4.35

Question 23

The graph of a normal distribution is symmetrical about the ______________.

Accepted Answer

Mean

Question 24

Which of the following terms is considered as a measure of the central location of a random variable?

Accepted Answer

Mean Value

Question 25

Two values that can describe how scattered or spread out the scores are from the mean value of the random variable.

Accepted Answer

Variance and standard deviation

Question 26

Taverage height of adult women in a certain city is 64 inches, with a standard deviation of 2.5 inches.

Accepted Answer

95%

Question 27

What formula is appropriate to use in finding the mean of a discrete random variable?

Accepted Answer

μ=\sum_{ }^{ }〖X∙P(X)〗

Question 28

The following table shows the probability distribution of a discrete random variable X. Find the value of n.

Accepted Answer

0.35

Question 29

What must be the value of the probability of each random variable?

Accepted Answer

0≤P(X)≤1

Question 30

What are the possible outcomes of tossing a coin once?

Accepted Answer

Head, Tail

STATS AND PROB 3rd QUARTER EXAM REVIEW

Questions 30

STATS AND PROB 3rd QUARTER EXAM REVIEW

Questions 30