Question 1

A true/false test has 100 questions.Using the normal approximation to the binomial distribution, what is the probability of getting 55 or more correct by just guessing?

Accepted Answer

A) p(X > 55) 
B) p(X > 55.5) 
C) p(X > 54.5) 
D) none of the above 
A) p(X > 55) 
B) p(X > 55.5) 
C) p(X > 54.5) 
D) none of the above

Question 2

A vertical line is drawn through a normal distribution dividing the distribution into two parts.If the smaller part equals 0.1915 of the distribution, then the line was drawn at z = 0.50 or at z = -0.50.

Accepted Answer

A) True 
 B)False

Question 3

What proportion of a normal distribution is located between z = -1.50 and z = +1.50?

Accepted Answer

A) 0.9332 
B) 0.0668 
C) 0.4332 
D) 0.8664 
A) 0.9332 
B) 0.0668 
C) 0.4332 
D) 0.8664

Question 4

If one score is randomly selected from a normal distribution with µ = 100 and σ = 20, the probability of obtaining a score between X = 80 and X = 120 is p = 0.3413.

Accepted Answer

A) True 
 B)False

Question 5

For a normal distribution, the z-score boundary that separates the lowest 2.5% of the scores from the rest is z = -1.96.

Accepted Answer

A) True 
 B)False

Question 6

What proportion of a normal distribution is located between z = -0.25 and z = +0.25?

Accepted Answer

A) 0.5987 
B) 0.4013 
C) 0.0987 
D) 0.1974 
A) 0.5987 
B) 0.4013 
C) 0.0987 
D) 0.1974

Question 7

What proportion of a normal distribution is located in the tail beyond z = 2.00?

Accepted Answer

A) 0.9772 
B) 0.0228 
C) 0.4772 
D) 0.0456 
A) 0.9772 
B) 0.0228 
C) 0.4772 
D) 0.0456

Question 8

A normal distribution has a mean of µ = 80 with σ = 20.What score separates the highest 40% of the distribution from the rest of the scores?

Accepted Answer

A) X = 75 
B) X = 85 
C) X = 54.4 
D) X = 105.6 
A) X = 75 
B) X = 85 
C) X = 54.4 
D) X = 105.6

Question 9

For any normal distribution, the proportion located between the mean and z = 1.40 is 0.9192.

Accepted Answer

A) True 
 B)False

Question 10

If one score is randomly selected from a normal distribution with µ = 100 and σ = 20, the probability of obtaining a score less than X = 70 is p = 0.0013.

Accepted Answer

A) True 
 B)False

Question 11

What proportion of a normal distribution is located in the tail beyond z = -1.00?

Accepted Answer

A) 0.8413 
B) 0.1587 
C) -0.3413 
D) -0.1587 
A) 0.8413 
B) 0.1587 
C) -0.3413 
D) -0.1587

Question 12

If one score is randomly selected from a normal distribution with µ = 100 and σ = 20, the probability of obtaining a score between X = 90 and X = 100 is p = 0.3085.

Accepted Answer

A) True 
 B)False

Question 13

A normal distribution has a mean of µ = 100 with σ = 20.If one score is randomly selected from this distribution, what is the probability that the score will have a value between X = 80 and X = 100?

Accepted Answer

A) 0.8413 
B) 0.1587 
C) 0.3413 
D) 0.6826 
A) 0.8413 
B) 0.1587 
C) 0.3413 
D) 0.6826

Question 14

For any normal distribution, exactly 97.50% of the z-score values are less than z = 1.96.

Accepted Answer

A) True 
 B)False

Question 15

A vertical line drawn through a normal distribution at z = 1.25 will separate the distribution into two sections.The proportion in the smaller section is 0.1056.

Accepted Answer

A) True 
 B)False

Question 16

A normal distribution has a mean of µ = 100 with σ = 20.If one score is randomly selected from this distribution, what is the probability that the score will have a value between X = 90 and X = 120?

Accepted Answer

A) 0.1498 
B) 0.4672 
C) 0.5328 
D) 0.2996 
A) 0.1498 
B) 0.4672 
C) 0.5328 
D) 0.2996

Question 17

A normal distribution has a mean of µ = 24 with σ = 3.What is the minimum score needed to be in the top 14% of the distribution?

Accepted Answer

A) X = 20.76 
B) X = 27.24 
C) X = 25.08 
D) X = 24.42 
A) X = 20.76 
B) X = 27.24 
C) X = 25.08 
D) X = 24.42

Question 18

For the normal approximation to the binomial distribution with n = 100 and p = ½ , a score of X = 60 corresponds to a z-score of z = 2.00.

Accepted Answer

A) True 
 B)False

Question 19

A normal distribution has a mean of µ = 80 with σ = 20.What score separates the lowest 30% of the distribution from the rest of the scores?

Accepted Answer

A) X = 90.4 
B) X = 69.6 
C) X = 110 
D) X = 50 
A) X = 90.4 
B) X = 69.6 
C) X = 110 
D) X = 50

Question 20

A true/false test has 100 questions.Using the normal approximation to the binomial distribution, what is the probability of getting more than 55 correct by just guessing?

Accepted Answer

A) p(X > 55) 
B) p(X > 55.5) 
C) p(X > 54.5) 
D) none of the above 
A) p(X > 55) 
B) p(X > 55.5) 
C) p(X > 54.5) 
D) none of the above

A true/false test has 100 questions.Using the normal approximation to the binomial distribution, what is the probability of getting 55 or more correct by just guessing?

A vertical line is drawn through a normal distribution dividing the distribution into two parts.If the smaller part equals 0.1915 of the distribution, then the line was drawn at z = 0.50 or at z = -0.50.

What proportion of a normal distribution is located between z = -1.50 and z = +1.50?

If one score is randomly selected from a normal distribution with µ = 100 and σ = 20, the probability of obtaining a score between X = 80 and X = 120 is p = 0.3413.

For a normal distribution, the z-score boundary that separates the lowest 2.5% of the scores from the rest is z = -1.96.

What proportion of a normal distribution is located between z = -0.25 and z = +0.25?

What proportion of a normal distribution is located in the tail beyond z = 2.00?

A normal distribution has a mean of µ = 80 with σ = 20.What score separates the highest 40% of the distribution from the rest of the scores?

For any normal distribution, the proportion located between the mean and z = 1.40 is 0.9192.

If one score is randomly selected from a normal distribution with µ = 100 and σ = 20, the probability of obtaining a score less than X = 70 is p = 0.0013.

What proportion of a normal distribution is located in the tail beyond z = -1.00?

If one score is randomly selected from a normal distribution with µ = 100 and σ = 20, the probability of obtaining a score between X = 90 and X = 100 is p = 0.3085.

A normal distribution has a mean of µ = 100 with σ = 20.If one score is randomly selected from this distribution, what is the probability that the score will have a value between X = 80 and X = 100?

For any normal distribution, exactly 97.50% of the z-score values are less than z = 1.96.

A vertical line drawn through a normal distribution at z = 1.25 will separate the distribution into two sections.The proportion in the smaller section is 0.1056.

A normal distribution has a mean of µ = 100 with σ = 20.If one score is randomly selected from this distribution, what is the probability that the score will have a value between X = 90 and X = 120?

A normal distribution has a mean of µ = 24 with σ = 3.What is the minimum score needed to be in the top 14% of the distribution?

For the normal approximation to the binomial distribution with n = 100 and p = ½ , a score of X = 60 corresponds to a z-score of z = 2.00.

A normal distribution has a mean of µ = 80 with σ = 20.What score separates the lowest 30% of the distribution from the rest of the scores?

A true/false test has 100 questions.Using the normal approximation to the binomial distribution, what is the probability of getting more than 55 correct by just guessing?

Introduction to Statistics

Frequency Distributions

Central Tendency

Variability

Z-Scores

The Distribution of Sample Means

Introduction to Hypothesis Testing

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures Anova

Two-Factor Analysis of Variance

Correlation

Introduction to Regression

Chi-Square Tests

The Binomial Test

Choosing the Right Statistics

Filters

Exam 6: Probability

A true/false test has 100 questions.Using the normal approximation to the binomial distribution, what is the probability of getting 55 or more correct by just guessing?

A vertical line is drawn through a normal distribution dividing the distribution into two parts.If the smaller part equals 0.1915 of the distribution, then the line was drawn at z = 0.50 or at z = -0.50.

What proportion of a normal distribution is located between z = -1.50 and z = +1.50?

If one score is randomly selected from a normal distribution with µ = 100 and σ = 20, the probability of obtaining a score between X = 80 and X = 120 is p = 0.3413.

For a normal distribution, the z-score boundary that separates the lowest 2.5% of the scores from the rest is z = -1.96.

What proportion of a normal distribution is located between z = -0.25 and z = +0.25?

What proportion of a normal distribution is located in the tail beyond z = 2.00?

A normal distribution has a mean of µ = 80 with σ = 20.What score separates the highest 40% of the distribution from the rest of the scores?

For any normal distribution, the proportion located between the mean and z = 1.40 is 0.9192.

If one score is randomly selected from a normal distribution with µ = 100 and σ = 20, the probability of obtaining a score less than X = 70 is p = 0.0013.

What proportion of a normal distribution is located in the tail beyond z = -1.00?

If one score is randomly selected from a normal distribution with µ = 100 and σ = 20, the probability of obtaining a score between X = 90 and X = 100 is p = 0.3085.

A normal distribution has a mean of µ = 100 with σ = 20.If one score is randomly selected from this distribution, what is the probability that the score will have a value between X = 80 and X = 100?

For any normal distribution, exactly 97.50% of the z-score values are less than z = 1.96.

A vertical line drawn through a normal distribution at z = 1.25 will separate the distribution into two sections.The proportion in the smaller section is 0.1056.

A normal distribution has a mean of µ = 100 with σ = 20.If one score is randomly selected from this distribution, what is the probability that the score will have a value between X = 90 and X = 120?

A normal distribution has a mean of µ = 24 with σ = 3.What is the minimum score needed to be in the top 14% of the distribution?

For the normal approximation to the binomial distribution with n = 100 and p = ½ , a score of X = 60 corresponds to a z-score of z = 2.00.

A normal distribution has a mean of µ = 80 with σ = 20.What score separates the lowest 30% of the distribution from the rest of the scores?

A true/false test has 100 questions.Using the normal approximation to the binomial distribution, what is the probability of getting more than 55 correct by just guessing?

Introduction to Statistics

Frequency Distributions

Central Tendency

Variability

Z-Scores

The Distribution of Sample Means

Introduction to Hypothesis Testing

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures Anova

Two-Factor Analysis of Variance

Correlation

Introduction to Regression

Chi-Square Tests

The Binomial Test

Choosing the Right Statistics

Filters