Question 1

What percent of students from question 12 fall within 1.96 standard deviations above and below the mean?

Accepted Answer

A)  34 
B)  68 
C)  48 
D)  95 
A)  34 
B)  68 
C)  48 
D)  95 D

Question 2

How many degrees of freedom are in a sample of 24 individuals?

Accepted Answer

A)  0 
B)  12 
C)  23 
D)  24 
A)  0 
B)  12 
C)  23 
D)  24 C

Question 3

Descriptive statistics are used to answer questions about how much confidence we can place in our results.

Accepted Answer

A) True 
 B)False  False

Question 4

Measure of dispersion and standard deviation are used in similar ways when calculating the standard error of the mean and proportion.

Accepted Answer

A) True 
 B)False

Question 5

Use the following table from the 2006 GSS to answer questions :
RACE OF RESPONDENT
  
-What is the standard error of the proportion white?

Accepted Answer

A)  .007 
B)  .014 
C)  .198 
D)  .728 
A)  .007 
B)  .014 
C)  .198 
D)  .728

Question 6

Use the following table from the 2006 GSS to answer questions :
RACE OF RESPONDENT
  
-What is the value of the measure of dispersion for the proportion white?

Accepted Answer

A)  .198 
B)  .272 
C)  .728 
D)  1 
A)  .198 
B)  .272 
C)  .728 
D)  1

Question 7

The goal in developing a sample is to maximize its generalizability.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following influences the standard error of the mean?

Accepted Answer

A)  dispersion in the data 
B)  number of cases 
C)  t ratio 
D)  both a and b 
A)  dispersion in the data 
B)  number of cases 
C)  t ratio 
D)  both a and b

Question 9

What type of error occurs when we claim that something is significant when it really is not?

Accepted Answer

A)  type 1 error 
B)  type 2 error 
C)  sampling error 
D)  standard error 
A)  type 1 error 
B)  type 2 error 
C)  sampling error 
D)  standard error

Question 10

Type 1 errors occur when we fail to claim that something is significant when it really is significant.

Accepted Answer

A) True 
 B)False

Question 11

What percent of employees from question 10 fall within one standard deviation above and below the mean?

Accepted Answer

A)  34 
B)  50 
C)  68 
D)  95 
A)  34 
B)  50 
C)  68 
D)  95

Question 12

Which of the following is NOT a type of random sample?

Accepted Answer

A)  cluster sample 
B)  snowball sample 
C)  stratified random sample 
D)  multistage cluster sample 
A)  cluster sample 
B)  snowball sample 
C)  stratified random sample 
D)  multistage cluster sample

Question 13

Use this table from the 2006 GSS to answer the following questions:
RACE OF RESPONDENT
   a. What is the standard error of the proportion white?
b.Report the 68% confidence interval for proportion white.
c. Based on your response to part b,interpret the 68% confidence interval.
d.Report the 95% confidence interval.
e.Report the 99% confidence interval.

Accepted Answer

a..007
b.68% CI = 72.1% to 73.5%
c.We ca

Question 14

Which of the following is a type of nonrandom sample?

Accepted Answer

A)  cluster sample 
B)  snowball sample 
C)  stratified random sample 
D)  multistage cluster sample 
A)  cluster sample 
B)  snowball sample 
C)  stratified random sample 
D)  multistage cluster sample

Question 15

Which of the following should be used to answer the question, "How sure of our results can we be?"

Accepted Answer

A)  descriptive statistics 
B)  inferential statistics 
C)  population parameters 
D)  population statistics 
A)  descriptive statistics 
B)  inferential statistics 
C)  population parameters 
D)  population statistics

Question 16

Increasing a sample size from 100 to 200 causes the standard error to 	----------.

Accepted Answer

A)  decrease 
B)  remain the same 
C)  increase 
A)  decrease 
B)  remain the same 
C)  increase

Question 17

Replacing "N" in the denominator of the formula for standard error of the mean with "N-1" results in a slightly smaller standard error.

Accepted Answer

A) True 
 B)False

Question 18

Use the following table from the 2006 GSS to answer questions :
RACE OF RESPONDENT
  
-What is the standard error of the proportion other?

Accepted Answer

A)  .005 
B)  .01 
C)  .113 
D)  .869 
A)  .005 
B)  .01 
C)  .113 
D)  .869

Question 19

The 2006 GSS asked respondents how many siblings they have. The mean number of siblings was 3.76 with a standard deviation of 3.178. N=2,988. Use this information to answer the following questions:
a. What is the standard error of the mean?
b.Report the 68% confidence interval.
c.Based on your response to part b, interpret the 68% confidence interval.
d.Report the 95% confidence interval.
e.Report the 99% confidence interval.

Accepted Answer

a..058
b. 68% CI= 3.702 to 3.818
c.68% o

Question 20

If a statistics class has 25 students, and has a distribution of grades with a mean of 70 and standard deviation of 15, what is the standard error of the mean?

Accepted Answer

A)  .6 
B)  1.5 
C)  3 
D)  6.5 
A)  .6 
B)  1.5 
C)  3 
D)  6.5

What percent of students from question 12 fall within 1.96 standard deviations above and below the mean?

How many degrees of freedom are in a sample of 24 individuals?

Descriptive statistics are used to answer questions about how much confidence we can place in our results.

Measure of dispersion and standard deviation are used in similar ways when calculating the standard error of the mean and proportion.

Use the following table from the 2006 GSS to answer questions : RACE OF RESPONDENT -What is the standard error of the proportion white?

Use the following table from the 2006 GSS to answer questions : RACE OF RESPONDENT -What is the value of the measure of dispersion for the proportion white?

The goal in developing a sample is to maximize its generalizability.

Which of the following influences the standard error of the mean?

What type of error occurs when we claim that something is significant when it really is not?

Type 1 errors occur when we fail to claim that something is significant when it really is significant.

What percent of employees from question 10 fall within one standard deviation above and below the mean?

Which of the following is NOT a type of random sample?

Which of the following is a type of nonrandom sample?

Which of the following should be used to answer the question, "How sure of our results can we be?"

Increasing a sample size from 100 to 200 causes the standard error to ----------.

Replacing "N" in the denominator of the formula for standard error of the mean with "N-1" results in a slightly smaller standard error.

Use the following table from the 2006 GSS to answer questions : RACE OF RESPONDENT -What is the standard error of the proportion other?

If a statistics class has 25 students, and has a distribution of grades with a mean of 70 and standard deviation of 15, what is the standard error of the mean?

Concepts, Variables, and Measurement

Frequency Tables

Measures of Central Tendency

Measures of Dispersion

Probability and the Normal Curve

Cross-Tabulation Tables and Chi-Square

Measures of Association for Categorical Variables

Analysis of Variance

Correlation and Regression

Filters

Exam 6: Probabilityfrom Samples to Statistics

What percent of students from question 12 fall within 1.96 standard deviations above and below the mean?

How many degrees of freedom are in a sample of 24 individuals?

Descriptive statistics are used to answer questions about how much confidence we can place in our results.

Measure of dispersion and standard deviation are used in similar ways when calculating the standard error of the mean and proportion.

Use the following table from the 2006 GSS to answer questions : RACE OF RESPONDENT -What is the standard error of the proportion white?

Use the following table from the 2006 GSS to answer questions : RACE OF RESPONDENT -What is the value of the measure of dispersion for the proportion white?

The goal in developing a sample is to maximize its generalizability.

Which of the following influences the standard error of the mean?

What type of error occurs when we claim that something is significant when it really is not?

Type 1 errors occur when we fail to claim that something is significant when it really is significant.

What percent of employees from question 10 fall within one standard deviation above and below the mean?

Which of the following is NOT a type of random sample?

Which of the following is a type of nonrandom sample?

Which of the following should be used to answer the question, "How sure of our results can we be?"

Increasing a sample size from 100 to 200 causes the standard error to ----------.

Replacing "N" in the denominator of the formula for standard error of the mean with "N-1" results in a slightly smaller standard error.

Use the following table from the 2006 GSS to answer questions : RACE OF RESPONDENT -What is the standard error of the proportion other?

If a statistics class has 25 students, and has a distribution of grades with a mean of 70 and standard deviation of 15, what is the standard error of the mean?

Concepts, Variables, and Measurement

Frequency Tables

Measures of Central Tendency

Measures of Dispersion

Probability and the Normal Curve

Cross-Tabulation Tables and Chi-Square

Measures of Association for Categorical Variables

Analysis of Variance

Correlation and Regression

Filters