Question 1

At a sample size of infinity, the t distribution:

Accepted Answer

A)  is unreliable. 
B)  has a standard deviation of 0. 
C)  is identical to the z distribution. 
D)  has a standard deviation of 0.50. 
A)  is unreliable. 
B)  has a standard deviation of 0. 
C)  is identical to the z distribution. 
D)  has a standard deviation of 0.50.

Question 2

The average salary for all 27 Arizona Diamondbacks in the 2012 baseball season was $2,653,029, with a standard deviation of $2,587,139.The population, all National League baseball players in 2012, earned an average salary of $3,213,479, with a standard deviation of $1,451,308.Does the average salary of the Diamondbacks players differ from that of all players in the National League? What statistical analysis is used to answer this question?

Accepted Answer

A)  single-sample t test 
B)  z test 
C)  standard deviation analysis 
D)  dependent-samples t test 
A)  single-sample t test 
B)  z test 
C)  standard deviation analysis 
D)  dependent-samples t test

Question 3

If the standard deviation for a population, as estimated from a sample, is s = 6.47, then the standard error for a sample size of N = 20 is sM =:

Accepted Answer

A)  0.32. 
B)  1.45. 
C)  2.09. 
D)  2.29. 
A)  0.32. 
B)  1.45. 
C)  2.09. 
D)  2.29.

Question 4

A confidence interval for a t test is centered around the mean of the sample.

Accepted Answer

A) True 
 B)False

At a sample size of infinity, the t distribution:

If the standard deviation for a population, as estimated from a sample, is s = 6.47, then the standard error for a sample size of N = 20 is s_M =:

A confidence interval for a t test is centered around the mean of the sample.

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

Exam 9: The Single-Sample T Test

At a sample size of infinity, the t distribution:

If the standard deviation for a population, as estimated from a sample, is s = 6.47, then the standard error for a sample size of N = 20 is sM =:

A confidence interval for a t test is centered around the mean of the sample.

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

If the standard deviation for a population, as estimated from a sample, is s = 6.47, then the standard error for a sample size of N = 20 is s_M =: