Asked by bhdrkn 4 years ago

**STAT 200**

1.

Discrete variables have values that can be measured.

A)

True

B)

False

2.

A(n) __________ probability distribution consists of the finite number of values a random variable can assume and the corresponding probabilities of the values.

3.

The number of song requests a radio station receives per day is indicated in the table below. Construct a graph for this data.

**Number of calls X**

8

9

10

11

12

**Probability P(X)**

0.21

0.31

0.16

0.14

0.18

4.

Find the mean of the distribution shown.

*X*

1

2

*P(X)*

0.32

0.68

5.

What is the standard deviation and variance of the following probability distribution?

*X*

0

2

4

6

8

*P(X)*

0.20

0.05

0.35

0.25

0.15

6.

In a survey, 55% of the voters support a particular referendum. If 30 voters are chosen at random, find the standard deviation and mean of the number of voters who support the referendum.

7.

The probability of a success remains the same for each trial in a binomial experiment.

A)

True

B)

False

8.

A certain type of battery has a 2% failure rate. Find the probability that a shipment of 30 batteries has exactly two defective batteries.

9.

Which of the following variables are discrete?

i. the depth of a submarine

ii. the number of torpedoes on a submarine

iii. the speed of the submarine

A)

ii

B)

i and iii

C)

i and ii

D)

i, ii, and iii

10.

Which of the following variables are continuous?

i. an automobile's gas mileage

ii. the air pressure in an automobile's spare tire

iii. an automobile's sticker price

A)

None are continuous.

B)

i

C)

i and ii

D)

i, ii, and iii

11. Extra

Credit

5pts.

If a gambler rolls two dice and gets a sum of 10, he wins $10, and if he gets a sum of three, he wins $20. The cost to play the game is $5. What is the expectation of this game?

12.

A student takes a 10-question, multiple-choice exam with five choices for each question and guesses on each question. Find the probability of guessing 2 or more out of 10 correctly.

STAT 200

bhdrkn

Answered by lancer 4 years ago

**Excerpt from file: **Math Tutorial 1. Discrete variables have values that can be measured. A) True B) False 2. A(n) _Discrete_ probability distribution consists of the finite number of values a random variable can assume and the corresponding probabilities of the values. 3. The number of song requests a radio station

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**Excerpt from file: **ITM501Module1SLP Module 1 - SLP Information networking as technology: tools, uses, and socio-technical interactions Module 1 SLP assignment: As your project assignment for module 1, you are to experiment with alternative web browsers and compare their utility and features. As you undoubtedly know,

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Surround your text in `*italics*`

or `**bold**`

, to write a math equation use, for example, `$x^2+2x+1=0$`

or `$$\beta^2-1=0$$`

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Asked: 4 years ago