Question 1

All probability values lie within the range of +1 to -1.00.

Accepted Answer

A) True 
 B)False  True

Question 2

When combining probabilities, to find the probability of one event OR another event, the separate probabilities should be

Accepted Answer

A)  multiplied 
B)  divided 
C)  subtracted 
D)  added 
A)  multiplied 
B)  divided 
C)  subtracted 
D)  added D

Question 3

When an event cannot occur, its probability value is

Accepted Answer

A)  .99 
B)  1.00 
C)  0 
D)  100% 
A)  .99 
B)  1.00 
C)  0 
D)  100% C

Question 4

The mean IQ in a certain sorority is 120 with an SD of 5. What is the probability of selecting at random a student whose IQ is between 130 and 135?

Accepted Answer

The answer of The mean IQ in a certain sorority...

Question 5

With a mean of 95 and an SD of 12, what is the probability of selecting at random a score of between 89 and 101?

Accepted Answer

The answer of With a mean of 95 and an...

Question 6

Odds against are based on how often a given event

Accepted Answer

A)  will occur out of 100 times 
B)  will occur out of any number of times 
C)  will occur just once 
D)  will not occur at all, to the number of times it will 
A)  will occur out of 100 times 
B)  will occur out of any number of times 
C)  will occur just once 
D)  will not occur at all, to the number of times it will

Question 7

At a certain casino on a certain day, 12% of the participants left at the end of the evening as winners (had more money than when they entered). What is the probability of selecting at random a participant who had had a winning evening?

Accepted Answer

A) .12 
B)  .24 
C)  .48 
D)  .88 
A) .12 
B)  .24 
C)  .48 
D)  .88

Question 8

The mean weight for a group of students is 130 pounds, with an SD of 8 pounds. What is the probability of selecting a single student who weighs 125 pounds or more?

Accepted Answer

The answer of The mean weight for a group of...

Question 9

If the probability of a certain event is .50 and the probability of a second event is .50, what is the probability of having the first event occur OR the second event occur?

Accepted Answer

A)  .25 
B)  .50 
C)  .75 
D)  1.00 
A)  .25 
B)  .50 
C)  .75 
D)  1.00

Question 10

When tossing coins, the frequency of occurrence of "heads" turning up is

Accepted Answer

A)  .50 
B)  .50% 
C)  1 to 1 
D)  50% 
A)  .50 
B)  .50% 
C)  1 to 1 
D)  50%

Question 11

With a mean of 55 and an SD of 6, what is the probability of selecting at random someone scoring between 48 and 50?

Accepted Answer

The answer of With a mean of 55 and an...

Question 12

The average life of a certain light bulb is 200 hours with an SD of 27 hours. What is the probability of selecting at random a bulb lasting 150 hours or less?

Accepted Answer

The answer of The average life of a certain light...

Question 13

Probability is always stated in terms of how often an event will occur.

Accepted Answer

A) True 
 B)False

Question 14

Under the normal curve, the probability of any single score being above the 50th percentile is

Accepted Answer

A)  0 
B)  .16 
C)  .34 
D)  .50 
A)  0 
B)  .16 
C)  .34 
D)  .50

Question 15

If an event can occur five times out of 100, its probability value is

Accepted Answer

A)  .20 
B)  .80 
C)  .95 
D)  .05 
A)  .20 
B)  .80 
C)  .95 
D)  .05

Question 16

Under the normal curve, the probability of a score occurring within one standard deviation (plus or minus) of the mean is

Accepted Answer

A)  .68 
B)  .50 
C)  2 to 1 
D)  .68% 
A)  .68 
B)  .50 
C)  2 to 1 
D)  .68%

Question 17

An event which occurs at a high frequency also has a high probability of occurring.

Accepted Answer

A) True 
 B)False

Question 18

Probability is equal to

Accepted Answer

A)  s/t 
B)  t/s 
C)  odds divided by chances 
D)  none of these 
A)  s/t 
B)  t/s 
C)  odds divided by chances 
D)  none of these

Question 19

If a coin is flipped 10 times, and by chance, heads turn up 10 times, on the next flip the probability of again obtaining a head is .50.

Accepted Answer

A) True 
 B)False

Question 20

When an event must occur, its probability value is

Accepted Answer

A)  .99 
B)  1.00 
C)  0 
D)  100% 
A)  .99 
B)  1.00 
C)  0 
D)  100%

All probability values lie within the range of +1 to -1.00.

When combining probabilities, to find the probability of one event OR another event, the separate probabilities should be

When an event cannot occur, its probability value is

The mean IQ in a certain sorority is 120 with an SD of 5. What is the probability of selecting at random a student whose IQ is between 130 and 135?

With a mean of 95 and an SD of 12, what is the probability of selecting at random a score of between 89 and 101?

Odds against are based on how often a given event

At a certain casino on a certain day, 12% of the participants left at the end of the evening as winners (had more money than when they entered). What is the probability of selecting at random a participant who had had a winning evening?

The mean weight for a group of students is 130 pounds, with an SD of 8 pounds. What is the probability of selecting a single student who weighs 125 pounds or more?

If the probability of a certain event is .50 and the probability of a second event is .50, what is the probability of having the first event occur OR the second event occur?

When tossing coins, the frequency of occurrence of "heads" turning up is

With a mean of 55 and an SD of 6, what is the probability of selecting at random someone scoring between 48 and 50?

The average life of a certain light bulb is 200 hours with an SD of 27 hours. What is the probability of selecting at random a bulb lasting 150 hours or less?

Probability is always stated in terms of how often an event will occur.

Under the normal curve, the probability of any single score being above the 50th percentile is

If an event can occur five times out of 100, its probability value is

Under the normal curve, the probability of a score occurring within one standard deviation (plus or minus) of the mean is

An event which occurs at a high frequency also has a high probability of occurring.

Probability is equal to

If a coin is flipped 10 times, and by chance, heads turn up 10 times, on the next flip the probability of again obtaining a head is .50.

When an event must occur, its probability value is

Introduction to Statistics

Percentages, Graphs and Measures of Central Tendency

Measures of Variability

The Normal Curve and Z Score

Z Scores, T Scores and Other Normal Curve Transformations

Statistics and Parameters

Parameter Estimates

The Fundamentals of Research Methodology

The Hypothesis of Difference

The Hypothesis of Association: Correlation

Analysis of Variance

Nominal Categorical Data and the Chi Square

Regression Analysis

Repeated-Measures and Matched-Subjects Designs Interval Data

Non-Parametrics Revisited: the Ordinal Case

Tests and Measurements

Filters

Exam 6: Probability

All probability values lie within the range of +1 to -1.00.

When combining probabilities, to find the probability of one event OR another event, the separate probabilities should be

When an event cannot occur, its probability value is

The mean IQ in a certain sorority is 120 with an SD of 5. What is the probability of selecting at random a student whose IQ is between 130 and 135?

With a mean of 95 and an SD of 12, what is the probability of selecting at random a score of between 89 and 101?

Odds against are based on how often a given event

At a certain casino on a certain day, 12% of the participants left at the end of the evening as winners (had more money than when they entered). What is the probability of selecting at random a participant who had had a winning evening?

The mean weight for a group of students is 130 pounds, with an SD of 8 pounds. What is the probability of selecting a single student who weighs 125 pounds or more?

If the probability of a certain event is .50 and the probability of a second event is .50, what is the probability of having the first event occur OR the second event occur?

When tossing coins, the frequency of occurrence of "heads" turning up is

With a mean of 55 and an SD of 6, what is the probability of selecting at random someone scoring between 48 and 50?

The average life of a certain light bulb is 200 hours with an SD of 27 hours. What is the probability of selecting at random a bulb lasting 150 hours or less?

Probability is always stated in terms of how often an event will occur.

Under the normal curve, the probability of any single score being above the 50th percentile is

If an event can occur five times out of 100, its probability value is

Under the normal curve, the probability of a score occurring within one standard deviation (plus or minus) of the mean is

An event which occurs at a high frequency also has a high probability of occurring.

Probability is equal to

If a coin is flipped 10 times, and by chance, heads turn up 10 times, on the next flip the probability of again obtaining a head is .50.

When an event must occur, its probability value is

Introduction to Statistics

Percentages, Graphs and Measures of Central Tendency

Measures of Variability

The Normal Curve and Z Score

Z Scores, T Scores and Other Normal Curve Transformations

Statistics and Parameters

Parameter Estimates

The Fundamentals of Research Methodology

The Hypothesis of Difference

The Hypothesis of Association: Correlation

Analysis of Variance

Nominal Categorical Data and the Chi Square

Regression Analysis

Repeated-Measures and Matched-Subjects Designs Interval Data

Non-Parametrics Revisited: the Ordinal Case

Tests and Measurements

Filters