Question 1

For the following set of numbers 21, 22, 25, 25, 27, 29, 30, 32, 33, 34, 35, 36, 36, 38, 39, 39, 39, 40, 42, 44, 45, 56, 57, 59, 60, 60, 60, set up a frequency distribution table with interval widths of 10 (starting at 20-29) .What is the frequency of the second interval?

Accepted Answer

A)  6
B)  8
C)  11
D)  4E) A) and B)
F) A) and C)

Question 2

A positively skewed distribution is also said to be

Accepted Answer

A)  skewed normally
B)  skewed left
C)  skewed down
D)  skewed up
E)  none of the aboveF) A) and C)
G) B) and E)

Question 3

Which of the following is NOT true about Tukey's stem-and-leaf plots?

Accepted Answer

A)  presents the data horizontally instead of vertically
B)  presents all of the numbers in the set
C)  can result in a single stem for some data sets
D)  represents missing values with 0 or 99E) A) and B)
F) None of the above

Question 4

The main difference between a bar graph and a histogram is

Accepted Answer

A)  two-dimensional bars instead of three-dimensional bars
B)  vertical instead of a horizontal presentation
C)  bar graphs have spaces between bars and histograms don't
D)  they are identical in every aspectE) A) and B)
F) C) and D)

Question 5

What did Dr.Snow do to show very effectively that his hypothesis was correct and thereby demonstrated the cause-effect relationship he advocated?

Accepted Answer

A)  drank from the Broad Street well
B)  removed the pump handle from the Broad Street well
C)  isolated the bacteria from the Broad Street well
D)  performed an autopsy on one of the victims before the city council
E)  all of the aboveF) B) and D)
G) A) and E)

Exam 2: Descriptive Statistics: Understanding Distributions of Numbers

What did Dr.Snow do to show very effectively that his hypothesis was correct and thereby demonstrated the cause-effect relationship he advocated?

Correct Answer
verified

A positively skewed distribution is also said to be

Correct Answer
verified

For the following set of numbers 21, 22, 25, 25, 27, 29, 30, 32, 33, 34, 35, 36, 36, 38, 39, 39, 39, 40, 42, 44, 45, 56, 57, 59, 60, 60, 60, set up a frequency distribution table with interval widths of 10 (starting at 20-29) .What is the frequency of the second interval?

Correct Answer
verified

The main difference between a bar graph and a histogram is

Correct Answer
verified

Which of the following is NOT true about Tukey's stem-and-leaf plots?

Correct Answer
verified

Exam 2: Descriptive Statistics: Understanding Distributions of Numbers

What did Dr.Snow do to show very effectively that his hypothesis was correct and thereby demonstrated the cause-effect relationship he advocated?

Correct AnswerverifiedShow Answer

A positively skewed distribution is also said to be

Correct AnswerverifiedShow Answer

For the following set of numbers 21, 22, 25, 25, 27, 29, 30, 32, 33, 34, 35, 36, 36, 38, 39, 39, 39, 40, 42, 44, 45, 56, 57, 59, 60, 60, 60, set up a frequency distribution table with interval widths of 10 (starting at 20-29) .What is the frequency of the second interval?

Correct AnswerverifiedShow Answer

The main difference between a bar graph and a histogram is

Correct AnswerverifiedShow Answer

Which of the following is NOT true about Tukey's stem-and-leaf plots?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified