Question 1

In statistics, smaller portion of the entire data or population is commonly called a

Accepted Answer

A)  subset
B)  group
C)  data set
D)  sample D

Question 2

For any probability distribution, the sum of probabilities is always

Accepted Answer

A)  0
B)  0.5
C)  1
D)  equal to the standard deviation. C

Question 3

That area of science that deals with collection, organization, analysis, and interpretation of data is known as

Accepted Answer

A)  probability
B)  statics
C)  statistics
D)  mathematics C

Question 4

The detailed shape of a normal-distribution curve is determined by its mean and standard deviation values.An experiment with a small standard deviation will produce a tall, narrow curve; whereas a large standard deviation will result in a short, wide curve.

Accepted Answer

A) True 
 B)False

Question 5

The cumulative frequency does not show the cumulative number of data with values up to and including those in the given range.

Accepted Answer

A) True 
 B)False

Question 6

The arithmetic average of a list of numbers is known as the

Accepted Answer

A)  median
B)  mode
C)  mean
D)  root mean squared

Question 7

Systemic errors are errors

Accepted Answer

A)  that occur throughout the entire system.
B)  that occur on a frequent basis.
C)  associated with using an inaccurate instrument.
D)  associated with the design and setup of the experiment.

Question 8

A list of temperature readings (in degrees Celsius) is shown below.Calculate the standard deviation for these data:
72, 76, 81, 69, 73, 76, 75, 82, 83, 68, 69, 76, 74, 65, 62

Accepted Answer

The answer of A list of temperature readings (in degrees...

Question 9

One simple way of organizing the data better would be to identify the lowest and the highest values, and then group the data into equal intervals or ranges:

Accepted Answer

A) True 
 B)False

Question 10

There are 20 red marbles and 10 blue marbles mixed together in a cloth bag.If you reach in and pull out a marble, without looking, what are the odds of selecting a blue marble?

Accepted Answer

A)  1:2
B)  1:3
C)  1:4
D)  1:5

Question 11

The probability distribution for many engineering experiments is approximated by

Accepted Answer

A)  the average (mean)  value of the data.
B)  a normal distribution.
C)  the standard deviation.
D)  none of the above.

Question 12

In statistics, something with a large number of data points is commonly called a

Accepted Answer

A)  population
B)  group
C)  data set
D)  sample

Question 13

The area under a normal distribution curve should always be equal to

Accepted Answer

A)  1
B)  0
C)  the standard deviation.
D)  the arithmetic mean.

Question 14

In statistics, one way of showing the range of values and their frequency is by showing a mean value.

Accepted Answer

A) True 
 B)False

Question 15

For normal distribution, what percentage of the data will fall in the interval of one standard deviation above and below the mean?

Accepted Answer

A)  50%
B)  65%
C)  68%
D)  95%

Question 16

In statistics, it is customary to normalize the mean and the standard deviation values of an experiment and work with what is called the standard normal distribution, which has a mean value of zero and a standard deviation value of 1.

Accepted Answer

A) True 
 B)False

Question 17

In probability, each time you repeat an experiment is called a

Accepted Answer

A)  trial
B)  test run
C)  measurement
D)  guess

Question 18

Median is the value in the middle of a data.It is that value that separates the higher half of the data from its lower half.

Accepted Answer

A) True 
 B)False

Question 19

There are 20 red marbles and 10 blue marbles mixed together in a cloth bag.If you reach in and pull out a marble, without looking, what is the probability of selecting a blue marble?

Accepted Answer

A)  0.75
B)  0.50
C)  0.25
D)  0.33

Question 20

This question has four possible answers listed below and only one of them is correct.If you select one at random, what is the probability that you pick the correct answer?

Accepted Answer

A)  0.75
B)  0.50
C)  0.25
D)  0.10

Exam 19: Probability and Statistics in Engineering

In statistics, smaller portion of the entire data or population is commonly called a

For any probability distribution, the sum of probabilities is always

That area of science that deals with collection, organization, analysis, and interpretation of data is known as

The detailed shape of a normal-distribution curve is determined by its mean and standard deviation values.An experiment with a small standard deviation will produce a tall, narrow curve; whereas a large standard deviation will result in a short, wide curve.

The cumulative frequency does not show the cumulative number of data with values up to and including those in the given range.

The arithmetic average of a list of numbers is known as the

Systemic errors are errors

A list of temperature readings (in degrees Celsius) is shown below.Calculate the standard deviation for these data: 72, 76, 81, 69, 73, 76, 75, 82, 83, 68, 69, 76, 74, 65, 62

One simple way of organizing the data better would be to identify the lowest and the highest values, and then group the data into equal intervals or ranges:

There are 20 red marbles and 10 blue marbles mixed together in a cloth bag.If you reach in and pull out a marble, without looking, what are the odds of selecting a blue marble?

The probability distribution for many engineering experiments is approximated by

In statistics, something with a large number of data points is commonly called a

The area under a normal distribution curve should always be equal to

In statistics, one way of showing the range of values and their frequency is by showing a mean value.

For normal distribution, what percentage of the data will fall in the interval of one standard deviation above and below the mean?

In statistics, it is customary to normalize the mean and the standard deviation values of an experiment and work with what is called the standard normal distribution, which has a mean value of zero and a standard deviation value of 1.

In probability, each time you repeat an experiment is called a

Median is the value in the middle of a data.It is that value that separates the higher half of the data from its lower half.

There are 20 red marbles and 10 blue marbles mixed together in a cloth bag.If you reach in and pull out a marble, without looking, what is the probability of selecting a blue marble?

This question has four possible answers listed below and only one of them is correct.If you select one at random, what is the probability that you pick the correct answer?