Question 1

The F-test used in one-way ANOVA is an extension of the t-test of $\mu$1 -$\mu$2.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following conditions is needed regarding the chi-squared test statistic for the test of variance?

Accepted Answer

A)  The population random variable must be normal. 
B)  The test statistic must be a non-negative number. 
C)  The test statistic must have a chi-squared distribution with n - 1 degrees of freedom. 
D)  All of these choices are true. 
A)  The population random variable must be normal. 
B)  The test statistic must be a non-negative number. 
C)  The test statistic must have a chi-squared distribution with n - 1 degrees of freedom. 
D)  All of these choices are true.

Question 3

For statistical inference about the mean of a single population when the population standard deviation is unknown, the degrees for freedom for the t-distribution equal n - 1 because we lose one degree of freedom by using the:

Accepted Answer

A)  sample mean as an estimate of the population mean. 
B)  sample standard deviation as an estimate of the population standard deviation. 
C)  sample proportion as an estimate of the population proportion. 
D)  sample size as an estimate of the population size. 
A)  sample mean as an estimate of the population mean. 
B)  sample standard deviation as an estimate of the population standard deviation. 
C)  sample proportion as an estimate of the population proportion. 
D)  sample size as an estimate of the population size.

Question 4

The deviations between the actual data points and the fitted values from the model are called ____________________.

Accepted Answer

The answer of The deviations between the actual data points...

Question 5

The sampling distribution of   is normal if the sampled populations are normal, and approximately normal if the populations are nonnormal and the sample sizes n1 and n2 are large.

Accepted Answer

A) True 
 B)False

Question 6

In one-way analysis of variance, between-treatments variation is measured by the:

Accepted Answer

A)  SSE 
B)  SS(Total) 
C)  SST 
D)  standard deviation 
A)  SSE 
B)  SS(Total) 
C)  SST 
D)  standard deviation

Question 7

The analysis of variance is a procedure that allows statisticians to compare two or more population:

Accepted Answer

A)  proportions. 
B)  means. 
C)  variances. 
D)  standard deviations. 
A)  proportions. 
B)  means. 
C)  variances. 
D)  standard deviations.

Question 8

The sum of squares for treatments, SST, achieves its smallest value (zero) when all the sample means are equal.

Accepted Answer

A) True 
 B)False

Question 9

When k = 2 the ____________________ experiment is identical to the ____________________ experiment.

Accepted Answer

multinomia

Question 10

For a 99% confidence interval of the population mean based on a sample of n = 25 with s = 0.05, the critical value of t is:

Accepted Answer

A)  2.7969 
B)  2.7874 
C)  2.4922 
D)  2.4851 
A)  2.7969 
B)  2.7874 
C)  2.4922 
D)  2.4851

Question 11

The equal-variances test statistic of   is Student t-distributed with n1 + n2 - 2 degrees of freedom provided that the two populations are ____________________.

Accepted Answer

The answer of The equal-variances test statistic of  ...

Question 12

One example of a blocking variable is the dosage level that each subject is assigned to in a randomized experiment.

Accepted Answer

A) True 
 B)False

Question 13

Before a chi-squared test of a contingency table can be carried out, the expected values of all cells should be greater than or equal to ____________________.

Accepted Answer

The answer of Before a chi-squared test of a contingency...

Question 14

The sampling distribution of the ratio of two sample variances   is said to be F-distributed provided that:

Accepted Answer

A)  the samples are independent from any distributions. 
B)  the populations are normal with equal variances. 
C)  the samples are matched and their sizes are large. 
D)  the samples are independently drawn from two normal populations. 
A)  the samples are independent from any distributions. 
B)  the populations are normal with equal variances. 
C)  the samples are matched and their sizes are large. 
D)  the samples are independently drawn from two normal populations.

Question 15

Which of the following assumptions concerning the probability distribution of the random error term is stated incorrectly?

Accepted Answer

A)  The distribution is normal. 
B)  The mean of the distribution is 0. 
C)  The variance of the distribution increases as x increases. 
D)  The errors are independent from one value of y to the next. 
A)  The distribution is normal. 
B)  The mean of the distribution is 0. 
C)  The variance of the distribution increases as x increases. 
D)  The errors are independent from one value of y to the next.

Question 16

When the objective is to compare more than two populations, the experimental design that is the counterpart of the matched pairs experiment is called a:

Accepted Answer

A)  completely randomized design. 
B)  one-way ANOVA design. 
C)  randomized block design. 
D)  None of these choices. 
A)  completely randomized design. 
B)  one-way ANOVA design. 
C)  randomized block design. 
D)  None of these choices.

Question 17

In regression analysis, you predict the value of one variable on the basis of one or more other related variables. The variable being predicted is called the ____________________ variable, and the related variables used to make the prediction are called ____________________ variables.

Accepted Answer

dependent;

Question 18

In simple linear regression, the denominator of the standard error of estimate s$\varepsilon$ is   .

Accepted Answer

A) True 
 B)False

Question 19

Consider the following ANOVA table:   The total number of observations is:

Accepted Answer

A)  25 
B)  29 
C)  30 
D)  32 
A)  25 
B)  29 
C)  30 
D)  32

Question 20

The Chairman of a committee has recently circulated pamphlets among the members, attempting to convince them that pension benefits should be the primary issue. A subsequent survey revealed the following breakdown of the members according to the plant at which they worked and the issue that they felt should be supported as the primary one.
   Do the data indicate at the 5% significant level that there are differences between the two plants regarding which issue should be the primary one?

Accepted Answer

H₀: Plant location and work i

The F-test used in one-way ANOVA is an extension of the t-test of $\mu$ ₁ - $\mu$ ₂.

Which of the following conditions is needed regarding the chi-squared test statistic for the test of variance?

For statistical inference about the mean of a single population when the population standard deviation is unknown, the degrees for freedom for the t-distribution equal n - 1 because we lose one degree of freedom by using the:

The deviations between the actual data points and the fitted values from the model are called ____________________.

The sampling distribution of is normal if the sampled populations are normal, and approximately normal if the populations are nonnormal and the sample sizes n₁ and n₂ are large.

In one-way analysis of variance, between-treatments variation is measured by the:

The analysis of variance is a procedure that allows statisticians to compare two or more population:

The sum of squares for treatments, SST, achieves its smallest value (zero) when all the sample means are equal.

When k = 2 the experiment is identical to the experiment.

For a 99% confidence interval of the population mean based on a sample of n = 25 with s = 0.05, the critical value of t is:

The equal-variances test statistic of is Student t-distributed with n₁ + n₂ - 2 degrees of freedom provided that the two populations are ____________________.

One example of a blocking variable is the dosage level that each subject is assigned to in a randomized experiment.

Before a chi-squared test of a contingency table can be carried out, the expected values of all cells should be greater than or equal to ____________________.

The sampling distribution of the ratio of two sample variances is said to be F-distributed provided that:

Which of the following assumptions concerning the probability distribution of the random error term is stated incorrectly?

When the objective is to compare more than two populations, the experimental design that is the counterpart of the matched pairs experiment is called a:

In regression analysis, you predict the value of one variable on the basis of one or more other related variables. The variable being predicted is called the variable, and the related variables used to make the prediction are called variables.

In simple linear regression, the denominator of the standard error of estimate s_{$\varepsilon$} is $In simple linear regression, the denominator of the standard error of estimate s<sub> \varepsilon </sub> is .$ .

Consider the following ANOVA table: The total number of observations is:

What Is Statistics

Graphical and Tabular Descriptive Techniques

Numerical Descriptive Techniques

Data Collection and Sampling

Probability

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, Part 1

Inference About Comparing Two Populations, Part 2

Analysis of Variance

Chi-Squared Tests

Simple Linear Regression and Correlation

Multiple Regression

Filters

Exam 18: Review of Statistical Inference

The F-test used in one-way ANOVA is an extension of the t-test of μ\muμ 1 - μ\muμ 2.

Which of the following conditions is needed regarding the chi-squared test statistic for the test of variance?

For statistical inference about the mean of a single population when the population standard deviation is unknown, the degrees for freedom for the t-distribution equal n - 1 because we lose one degree of freedom by using the:

The deviations between the actual data points and the fitted values from the model are called ____________________.

The sampling distribution of is normal if the sampled populations are normal, and approximately normal if the populations are nonnormal and the sample sizes n1 and n2 are large.

In one-way analysis of variance, between-treatments variation is measured by the:

The analysis of variance is a procedure that allows statisticians to compare two or more population:

The sum of squares for treatments, SST, achieves its smallest value (zero) when all the sample means are equal.

When k = 2 the ____________________ experiment is identical to the ____________________ experiment.

For a 99% confidence interval of the population mean based on a sample of n = 25 with s = 0.05, the critical value of t is:

The equal-variances test statistic of is Student t-distributed with n1 + n2 - 2 degrees of freedom provided that the two populations are ____________________.

One example of a blocking variable is the dosage level that each subject is assigned to in a randomized experiment.

Before a chi-squared test of a contingency table can be carried out, the expected values of all cells should be greater than or equal to ____________________.

The sampling distribution of the ratio of two sample variances is said to be F-distributed provided that:

Which of the following assumptions concerning the probability distribution of the random error term is stated incorrectly?

When the objective is to compare more than two populations, the experimental design that is the counterpart of the matched pairs experiment is called a:

In regression analysis, you predict the value of one variable on the basis of one or more other related variables. The variable being predicted is called the ____________________ variable, and the related variables used to make the prediction are called ____________________ variables.

In simple linear regression, the denominator of the standard error of estimate s ε\varepsilonε is .

Consider the following ANOVA table: The total number of observations is:

What Is Statistics

Graphical and Tabular Descriptive Techniques

Numerical Descriptive Techniques

Data Collection and Sampling

Probability

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, Part 1

Inference About Comparing Two Populations, Part 2

Analysis of Variance

Chi-Squared Tests

Simple Linear Regression and Correlation

Multiple Regression

Filters

The F-test used in one-way ANOVA is an extension of the t-test of $\mu$ ₁ - $\mu$ ₂.

The sampling distribution of is normal if the sampled populations are normal, and approximately normal if the populations are nonnormal and the sample sizes n₁ and n₂ are large.

When k = 2 the experiment is identical to the experiment.

The equal-variances test statistic of is Student t-distributed with n₁ + n₂ - 2 degrees of freedom provided that the two populations are ____________________.

In regression analysis, you predict the value of one variable on the basis of one or more other related variables. The variable being predicted is called the variable, and the related variables used to make the prediction are called variables.

In simple linear regression, the denominator of the standard error of estimate s_{$\varepsilon$} is $In simple linear regression, the denominator of the standard error of estimate s<sub> \varepsilon </sub> is .$ .