Question 1

The degrees of freedom of a paired t test based on n = 10 pairs is

Accepted Answer

The answer of The degrees of freedom of a paired...

Question 2

Which of the following rules is the Central Limit Theorem:

Accepted Answer

The answer of Which of the following rules is the...

Question 3

It is general agreed that the use of the chi-squared distribution is appropriate when the

Accepted Answer

A) sample size is at least 30. 
B) sample size is large enough so that all of the observed cell counts are at least 5. 
C) sample size is large enough so that all of the expected cell counts are at least 5. 
D) sample size is large enough so that at least one of the expected cell counts is at least 5. 
E) sample size is large enough so that at least 20% of the expected cell counts are at least 5.

Question 4

In a two-factor ANOVA for which there are 3 levels of factor A, 5 levels of factor B, and 2 observations on each treatment, there are

Accepted Answer

A) 12 degrees of freedom for the error sources of variation. 
B) 15 degrees of freedom for the error sources of variation. 
C) 16 degrees of freedom for the error sources of variation. 
D) 29 degrees of freedom for the error sources of variation. 
E) 30 degrees of freedom for the error sources of variation

Question 5

Consider the chance experiment of rolling a fair die and observing the number of dots facing up.The events, A and B, are defined as follows:

Accepted Answer

The answer of Consider the chance experiment of rolling a...

Question 6

Which of the following random variables is not discrete?

Accepted Answer

A) the number of courses in which a college student is enrolled 
B) the number of attempts needed in order to successfully complete a task 
C) the distance traveled by a motorcycle on one gallon of gas 
D) the number in a group of 20 people who have college degrees 
E) the number of words on an 8.5 x 11 inch sheet of paper

Question 7

Use the following information for questions 
One thousand students at a city high school were classified both according to GPA and
whether or not they consistently skipped classes.Here are the breakdowns: 
-What is the probability that a randomly selected student has a GPA between 2.0 and 3.0?

Accepted Answer

A) 0.025 
B) 0.227 
C) 0.450 
D) 0.475 
E) 0.506

Question 8

Which of the following is true:

Accepted Answer

The answer of Which of the following is true: 
...

Question 9

Suppose that for a set of numeric data, where the numbers are not all different, the standard deviation is less than 1.0.Then it must be true that  For questions 39-40, refer to the information below and the scatterplots of observed species and pH.The data is from 15 tributaries of Millers River in north-central Massachusetts, presenting the number of fish species vs.the mean pH level of the stream in 1983.

Accepted Answer

The answer of Suppose that for a set of numeric...

Question 10

In a two-factor ANOVA, the F test for

Accepted Answer

A) the factor A main effects should be carried out first. 
B) the factor B main effects should be carried out first. 
C) the interaction of factors A and B should be carried out first. 
D) the blocking effects should be carried out first. 
E) the homogeneity of variance should be carried out first.

Question 11

Accepted Answer

The answer of  ...

Question 12

Accepted Answer

The answer of ...

Question 13

Cucumbers grown on a certain farm have weights that are normally distributed with a standard deviation of 2 ounces.What is the mean weight if 85% of the cucumbers weigh less than 16 ounces?

Accepted Answer

A) 13.9 
B) 14.3 
C) 14.0 
D) 14.9 
E) 15.7

Question 14

Jane Doe and Richard Roe are law students.Their scores on the midterms and finals in the Statistics for Law class, together with the means and standard deviations for these exams are given below:  If their scores are transformed to z-scores, it is apparent that:

Accepted Answer

A) Jane did better than Richard on both exams. 
B) Richard did better than Jane on both exams. 
C) Jane did better on the first exam, Richard did better on the second. 
D) Richard did better on the first exam, Jane did better on the second. 
E) Richard and Jane did equally well on both exams.

Question 15

Accepted Answer

The answer of ...

Question 16

For which of the following statistics would one not need to put the data in order from smallest to largest?

Accepted Answer

A) the interquartile range 
B) the trimmed mean 
C) the median 
D) the range 
E) the variance

Question 17

Which of the following is not a statistical hypothesis?

Accepted Answer

The answer of Which of the following is not a...

Question 18

Accepted Answer

The answer of ...

Question 19

In utilizing direct control, which of the following are held constant?

Accepted Answer

A) values of an extraneous variable 
B) values of a blocking variable 
C) values of a response variable 
D) values of an explanatory variable 
E) values of a lurking variable

Question 20

In a randomized block design with 5 treatments and 4 blocks, if SSTr = 32.8 and SSE = 5.7 then the F value for testing the equality of the treatment means is approximately

Accepted Answer

The answer of In a randomized block design with 5...

Exam 17: Statistics and Probability Questions

The degrees of freedom of a paired t test based on n = 10 pairs is

Which of the following rules is the Central Limit Theorem:

It is general agreed that the use of the chi-squared distribution is appropriate when the

In a two-factor ANOVA for which there are 3 levels of factor A, 5 levels of factor B, and 2 observations on each treatment, there are

Consider the chance experiment of rolling a fair die and observing the number of dots facing up.The events, A and B, are defined as follows:

Which of the following random variables is not discrete?

Use the following information for questions One thousand students at a city high school were classified both according to GPA and whether or not they consistently skipped classes.Here are the breakdowns: -What is the probability that a randomly selected student has a GPA between 2.0 and 3.0?

Which of the following is true:

In a two-factor ANOVA, the F test for

Cucumbers grown on a certain farm have weights that are normally distributed with a standard deviation of 2 ounces.What is the mean weight if 85% of the cucumbers weigh less than 16 ounces?

Jane Doe and Richard Roe are law students.Their scores on the midterms and finals in the Statistics for Law class, together with the means and standard deviations for these exams are given below: If their scores are transformed to z-scores, it is apparent that:

For which of the following statistics would one not need to put the data in order from smallest to largest?

Which of the following is not a statistical hypothesis?

In utilizing direct control, which of the following are held constant?

In a randomized block design with 5 treatments and 4 blocks, if SSTr = 32.8 and SSE = 5.7 then the F value for testing the equality of the treatment means is approximately