Question 1

For a set of data with 5±1.5,at least 95% of scores are greater than 3.0.

Accepted Answer

A) True 
 B)False

Question 2

A researcher determines that students study an average of 80   20 (M   SD)minutes per week.Assuming these data are normally distributed,what is the z score for students studying 60 minutes per week?

Accepted Answer

A) 1.0 
B) -1.0 
C) .3413 
D) .1587 
A) 1.0 
B) -1.0 
C) .3413 
D) .1587

Question 3

The unit normal table can be used to find the probability of a particular score in both normal and nonnormal distributions.

Accepted Answer

A) True 
 B)False

Question 4

All z scores above the mean are positive,whereas all z scores below the mean are negative.

Accepted Answer

A) True 
 B)False

Question 5

When a z score equals 0,this means that there is no variability.

Accepted Answer

A) True 
 B)False

Question 6

A professor records the following final exam scores: 78   7 (M   SD).Students scoring in the top 14% get an A.What is the cutoff score for the top 14% in this example?

Accepted Answer

A) 1.08 
B) 70.44 
C) 85.56 
D) There is not enough information to answer this question. 
A) 1.08 
B) 70.44 
C) 85.56 
D) There is not enough information to answer this question.

Question 7

The binomial probability distribution is distributed with   ,and   =   .

Accepted Answer

A) True 
 B)False

Question 8

A researcher records the following times (in seconds)that it took a group of students to complete an exam: 18±2 minutes (M±SD).How long did it take 80% of students to complete the exam?

Accepted Answer

A) Less than 16 minutes. 
B) 16.32 minutes. 
C) Less than 18 minutes 
D) 19.68 minutes. 
A) Less than 16 minutes. 
B) 16.32 minutes. 
C) Less than 18 minutes 
D) 19.68 minutes.

Question 9

In a normal distribution,50% of all data:

Accepted Answer

A) fall above the mean 
B) fall below the median 
C) fall above and below the mode 
D) all of the above 
A) fall above the mean 
B) fall below the median 
C) fall above and below the mode 
D) all of the above

Question 10

The standard deviation and the mean can equal 0 in a data set that is normally distributed.

Accepted Answer

A) True 
 B)False

Question 11

A researcher records the following number of birdcalls made during an experimental session with robins: 7.2   0.6 (M   SD).Assuming these data are normally distributed,what is the probability that robins made more than 9 birdcalls during this experimental session?

Accepted Answer

A) .9987 
B) .4987 
C) .0013 
D) The probability is not listed in the unit normal table. 
A) .9987 
B) .4987 
C) .0013 
D) The probability is not listed in the unit normal table.

Question 12

In a normal distribution a score of 8 will always be more probable than a score of 0.

Accepted Answer

A) True 
 B)False

Question 13

State whether the first area is bigger,the second area is bigger,or the two areas are equal: the area to the right of the mean,or the area between z = ±1.00.

Accepted Answer

A) The first area is bigger. 
B) The second area is bigger. 
C) The two areas are the same. 
A) The first area is bigger. 
B) The second area is bigger. 
C) The two areas are the same.

Question 14

The standard normal distribution is normally distributed with a mean of ____ and a variance of ____.

Accepted Answer

A) 0;1 
B) 1;0 
C) any value;any positive value 
D) any positive value;any value 
A) 0;1 
B) 1;0 
C) any value;any positive value 
D) any positive value;any value

Question 15

A researcher records the following assessment data: 42   6 (M   SD).The researcher only wants to sample participants scoring in the top 20% of this assessment.What is the cutoff score for the top 20% in this example?

Accepted Answer

A) 0.84 
B) 47.04 
C) 36.96 
D) There is not enough information to answer this question. 
A) 0.84 
B) 47.04 
C) 36.96 
D) There is not enough information to answer this question.

Question 16

In a normal distribution with 3   1 (M   SD),a researcher can appropriately conclude that about 84.13% of scores were greater than 2.

Accepted Answer

A) True 
 B)False

Question 17

Data are normally distributed as 12.5   0.5 (M   SD).A score of 13.2 marks the top 33% of scores in this distribution.

Accepted Answer

A) True 
 B)False

Question 18

In a normal distribution,the probability of a score above the mean is larger than the probability of a score between first standard deviation above and below the mean.

Accepted Answer

A) True 
 B)False

Question 19

The mean,median,and mode are all located at the 50th percentile in a perfect normal distribution.

Accepted Answer

A) True 
 B)False

For a set of data with 5±1.5,at least 95% of scores are greater than 3.0.

A researcher determines that students study an average of 80 20 (M SD)minutes per week.Assuming these data are normally distributed,what is the z score for students studying 60 minutes per week?

The unit normal table can be used to find the probability of a particular score in both normal and nonnormal distributions.

All z scores above the mean are positive,whereas all z scores below the mean are negative.

When a z score equals 0,this means that there is no variability.

A professor records the following final exam scores: 78 7 (M SD).Students scoring in the top 14% get an A.What is the cutoff score for the top 14% in this example?

The binomial probability distribution is distributed with ,and = .

A researcher records the following times (in seconds)that it took a group of students to complete an exam: 18±2 minutes (M±SD).How long did it take 80% of students to complete the exam?

In a normal distribution,50% of all data:

The standard deviation and the mean can equal 0 in a data set that is normally distributed.

A researcher records the following number of birdcalls made during an experimental session with robins: 7.2 0.6 (M SD).Assuming these data are normally distributed,what is the probability that robins made more than 9 birdcalls during this experimental session?

In a normal distribution a score of 8 will always be more probable than a score of 0.

State whether the first area is bigger,the second area is bigger,or the two areas are equal: the area to the right of the mean,or the area between z = ±1.00.

The standard normal distribution is normally distributed with a mean of and a variance of .

A researcher records the following assessment data: 42 6 (M SD).The researcher only wants to sample participants scoring in the top 20% of this assessment.What is the cutoff score for the top 20% in this example?

In a normal distribution with 3 1 (M SD),a researcher can appropriately conclude that about 84.13% of scores were greater than 2.

Data are normally distributed as 12.5 0.5 (M SD).A score of 13.2 marks the top 33% of scores in this distribution.

In a normal distribution,the probability of a score above the mean is larger than the probability of a score between first standard deviation above and below the mean.

The mean,median,and mode are all located at the 50th percentile in a perfect normal distribution.

Introduction to Statistics

Summarizing Data: Frequency Distributions in

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability, Normal Distributions, and Z Scores

Hypothesis Testing: Significance, Effect Size, and Power

Testing Means: One-Sample T Test With Confidence Intervals

Testing Means: Two- Independent-Sample T Test With Confidence Intervals

Testing Means: Related-Samples T Test With Confidence Intervals

One-Way Analysis of Variance: Between- Subjects and Within- Subjects Repeated- Measures Designs

Two-Way Analysis of Variance: Between-Subjects Factorial Design

Correlation and Linear Regression

Chi-Square Tests: Goodness of Fit and the Test for Independence

Nonparametric Tests for Ordinal Data: Understanding and Interpretation

Chi-Square Tests: Goodness-of-Fit and Independence

Understanding Regression Analysis

Understanding Correlation Coefficients in Statistical Analysis

Filters

Exam 6: Characteristics of the Sample Mean

For a set of data with 5±1.5,at least 95% of scores are greater than 3.0.

A researcher determines that students study an average of 80 20 (M SD)minutes per week.Assuming these data are normally distributed,what is the z score for students studying 60 minutes per week?

The unit normal table can be used to find the probability of a particular score in both normal and nonnormal distributions.

All z scores above the mean are positive,whereas all z scores below the mean are negative.

When a z score equals 0,this means that there is no variability.

A professor records the following final exam scores: 78 7 (M SD).Students scoring in the top 14% get an A.What is the cutoff score for the top 14% in this example?

The binomial probability distribution is distributed with ,and = .

A researcher records the following times (in seconds)that it took a group of students to complete an exam: 18±2 minutes (M±SD).How long did it take 80% of students to complete the exam?

In a normal distribution,50% of all data:

The standard deviation and the mean can equal 0 in a data set that is normally distributed.

A researcher records the following number of birdcalls made during an experimental session with robins: 7.2 0.6 (M SD).Assuming these data are normally distributed,what is the probability that robins made more than 9 birdcalls during this experimental session?

In a normal distribution a score of 8 will always be more probable than a score of 0.

State whether the first area is bigger,the second area is bigger,or the two areas are equal: the area to the right of the mean,or the area between z = ±1.00.

The standard normal distribution is normally distributed with a mean of ____ and a variance of ____.

A researcher records the following assessment data: 42 6 (M SD).The researcher only wants to sample participants scoring in the top 20% of this assessment.What is the cutoff score for the top 20% in this example?

In a normal distribution with 3 1 (M SD),a researcher can appropriately conclude that about 84.13% of scores were greater than 2.

Data are normally distributed as 12.5 0.5 (M SD).A score of 13.2 marks the top 33% of scores in this distribution.

In a normal distribution,the probability of a score above the mean is larger than the probability of a score between first standard deviation above and below the mean.

The mean,median,and mode are all located at the 50th percentile in a perfect normal distribution.

Introduction to Statistics

Summarizing Data: Frequency Distributions in

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability, Normal Distributions, and Z Scores

Hypothesis Testing: Significance, Effect Size, and Power

Testing Means: One-Sample T Test With Confidence Intervals

Testing Means: Two- Independent-Sample T Test With Confidence Intervals

Testing Means: Related-Samples T Test With Confidence Intervals

One-Way Analysis of Variance: Between- Subjects and Within- Subjects Repeated- Measures Designs

Two-Way Analysis of Variance: Between-Subjects Factorial Design

Correlation and Linear Regression

Chi-Square Tests: Goodness of Fit and the Test for Independence

Nonparametric Tests for Ordinal Data: Understanding and Interpretation

Chi-Square Tests: Goodness-of-Fit and Independence

Understanding Regression Analysis

Understanding Correlation Coefficients in Statistical Analysis

Filters

The standard normal distribution is normally distributed with a mean of and a variance of .