Question 1

Which of the following statements is true?

Accepted Answer

A)  Descriptive techniques summarize information from samples. 
B)  Inferential techniques allow us to make estimates about a population. 
C)  Inferential techniques allow us to draw conclusions about a population. 
D)  All of these statements are true. 
A)  Descriptive techniques summarize information from samples. 
B)  Inferential techniques allow us to make estimates about a population. 
C)  Inferential techniques allow us to draw conclusions about a population. 
D)  All of these statements are true. D

Question 2

We can decrease the probability of a Type II error by increasing the ____________________.

Accepted Answer

sample size

Question 3

____________________ techniques allow us to make estimates and draw conclusions about populations from samples.

Accepted Answer

Inferential

Question 4

We can use analysis of variance (ANOVA)in place of the t-test when comparing two population means.

Accepted Answer

A) True 
 B)False

Question 5

If the probability of making a Type II error decreases,the probability of making a Type I error increases.

Accepted Answer

A) True 
 B)False

Question 6

Which type of data involves ratings?

Accepted Answer

A)  Interval data 
B)  Ordinal data 
C)  Nominal data 
D)  None of these 
A)  Interval data 
B)  Ordinal data 
C)  Nominal data 
D)  None of these

Question 7

The standard normal distribution and the Chi-squared distribution are related to each other.

Accepted Answer

A) True 
 B)False

Question 8

Statistical inferences are facts and are not based on probability.

Accepted Answer

A) True 
 B)False

Question 9

One prevailing idea amongst statisticians is the idea of "Garbage in / garbage out." Explain the meaning of this phrase and give an example of it.

Accepted Answer

The validity of any statistical result o

Question 10

We can use regression analysis with indicator variables in place of analysis of variance (ANOVA).

Accepted Answer

A) True 
 B)False

Question 11

If the difference between the null hypothesis and your test statistic is very large,you reject the null hypothesis.

Accepted Answer

A) True 
 B)False

Question 12

The validity of any statistical outcome depends on the validity of its sample.

Accepted Answer

A) True 
 B)False

Question 13

Which type of data involves real numbers?

Accepted Answer

A)  Nominal data 
B)  Interval data 
C)  Ordinal data 
D)  None of these choices. 
A)  Nominal data 
B)  Interval data 
C)  Ordinal data 
D)  None of these choices.

Question 14

If you use information about a sample to draw a conclusion about a population,you are doing:

Accepted Answer

A)  Inferential parameters 
B)  Descriptive statistics 
C)  Inferential statistics 
D)  The wrong kind of statistics 
A)  Inferential parameters 
B)  Descriptive statistics 
C)  Inferential statistics 
D)  The wrong kind of statistics

Question 15

The techniques used to analyze nominal data involve a ranking procedure.

Accepted Answer

A) True 
 B)False

Question 16

The width of a confidence interval ____________________ when more data is collected.

Accepted Answer

The answer of The width of a confidence interval ____________________...

Question 17

Which of the following data collection methods is more likely to lead to a definitive conclusion?

Accepted Answer

A)  Data collected through observation. 
B)  Data collected through an experiment. 
C)  Data collected through the use of volunteers. 
D)  Data collected through a survey. 
A)  Data collected through observation. 
B)  Data collected through an experiment. 
C)  Data collected through the use of volunteers. 
D)  Data collected through a survey.

Question 18

Which of the following is an example of interval data?

Accepted Answer

A)  The weight of a newborn baby. 
B)  The gender of a baby. 
C)  Whether or not a baby weighs more than 10 pounds. 
D)  Your order of preference of three baby names. 
A)  The weight of a newborn baby. 
B)  The gender of a baby. 
C)  Whether or not a baby weighs more than 10 pounds. 
D)  Your order of preference of three baby names.

Question 19

How do the requirements of nonparametric and parametric techniques compare?

Accepted Answer

A)  Nonparametric techniques have more restrictions than parametric techniques. 
B)  Nonparametric techniques have fewer restrictions than parametric techniques. 
C)  Both types of techniques have the same requirements. 
D)  There are no requirements for parametric or nonparametric techniques. 
A)  Nonparametric techniques have more restrictions than parametric techniques. 
B)  Nonparametric techniques have fewer restrictions than parametric techniques. 
C)  Both types of techniques have the same requirements. 
D)  There are no requirements for parametric or nonparametric techniques.

Question 20

In analyzing interval data,we attempt to explain as much of the ____________________ as possible.

Accepted Answer

The answer of In analyzing interval data,we attempt to explain...

Exam 23: Conclusion

Which of the following statements is true?

We can decrease the probability of a Type II error by increasing the ____________________.

____________________ techniques allow us to make estimates and draw conclusions about populations from samples.

We can use analysis of variance (ANOVA)in place of the t-test when comparing two population means.

If the probability of making a Type II error decreases,the probability of making a Type I error increases.

Which type of data involves ratings?

The standard normal distribution and the Chi-squared distribution are related to each other.

Statistical inferences are facts and are not based on probability.

One prevailing idea amongst statisticians is the idea of "Garbage in / garbage out." Explain the meaning of this phrase and give an example of it.

We can use regression analysis with indicator variables in place of analysis of variance (ANOVA).

If the difference between the null hypothesis and your test statistic is very large,you reject the null hypothesis.

The validity of any statistical outcome depends on the validity of its sample.

Which type of data involves real numbers?

If you use information about a sample to draw a conclusion about a population,you are doing:

The techniques used to analyze nominal data involve a ranking procedure.

The width of a confidence interval ____________________ when more data is collected.

Which of the following data collection methods is more likely to lead to a definitive conclusion?

Which of the following is an example of interval data?

How do the requirements of nonparametric and parametric techniques compare?

In analyzing interval data,we attempt to explain as much of the ____________________ as possible.

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

A: Numerical Descriptive Techniques

B: Numerical Descriptive Techniques

C: Numerical Descriptive Techniques

Data Collection and Sampling

Probability

A: Random Variables and Discrete Probability Distributions

B: Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

Chi-Squared Tests

A: Simple Linear Regression and Correlation

B: Simple Linear Regression and Correlation

Multiple Regression

Model Building

Nonparametric Statistics

Time-Series Analysis and Forecasting

Statistical Process Control

Decision Analysis

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