A probability distribution has:

a mean and a standard deviation

all of the answers are true of a normal curve

Which of the following is true of probabilities?

A probability varies from 0 to 1.0.

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CHAPTER 5: Probability and the Normal Curve

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The basics probability distribution

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Questions 12

Answers

1
The normal curve is:
applicable to all real-life research situations
all of the answers are correct
a theoretical ideal
positively skewed
2
The average price for a car is $18,000 and SD is $1,500. Calculate the z scores if X=16,000
-1.33
.78
9.33
.99
3
A probability distribution has:
a mean and a standard deviation
no standard deviation
none of the answers are correct
no mean
4
Roughly__ of the area under the normal curve rests between the mean and one standard deviation
17
50
34
40
5
Which of the following is true of the normal distribution?
The normal distribution is unimodal
The tails extend indefinitely in either direction
All of the answers are true
The normal distribution is symmetrical.
6
Which of the following is NOT true of the normal curve?
It is skewed
It is a probability distribution
The mode, median, and mean are identical
Its total area contains 100% of the cases
7
The probability of rolling a 4 or a 6 on one toss of a standard six-sided die is:
.333
.167
.028
.409
8
A normal curve:
is used in statistics for making decisions
all of the answers are true of a normal curve
is a theoretical ideal or model
can be used to describe distributions
9
The probability of rolling a 4 on one toss of standard six-sided die and 6 on second toss is:
.409
.333
.028
.167
10
The probability of a student correctly guessing the answer to this question is:
.20
.30
.25
.50
11
Which of the following is true of probabilities?
None of the answers are correct.
A 0 probability implies something is possible
A probability varies from 0 to 1.0.
A 1.0 probability implies something is impossible.
12
The probability of rolling a 4 on one toss of a standard six-sided die is:
.167
.25
1.67
.1

CHAPTER 5: Probability and the Normal Curve Flashcards | StudBud