FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 2: Describing the Distribution of a Single Variable

Show Answer

Share

---

All types

Filters

Study FlashcardsPractice ExamLearn

Question 31

True/False

Review LaterAdd Note

Review Later

There are four quartiles that divide the values in a data set into four equal parts.

A) True
B) False

Correct Answer

verified

Show Answer

Question 32

Multiple Choice

Review LaterAdd Note

Review Later

Categorizing age variables as "young," "middle-aged," and "elderly" is an example of

A) counting
B) ordering
C) value adding
D) binning
E) categorizing

F) B) and E)
G) C) and D)

Correct Answer

verified

Show Answer

Question 33

True/False

Review LaterAdd Note

The mean is a measure of central tendency.

In order for the characteristics of a sample to be generalized to the entire population,it should be:

What is the most common type of chart for showing the distribution of a numerical variable?

The difference between the first and third quartile is called the

A variable (or field or attribute)is a characteristic of members of a population,whereas an observation (or case or record)is a list of all variable values for a single member of a population.

As a graphical tool,the histogram is ideal for showing whether the distribution of a numerical variable is symmetric or skewed.

Age,height,and weight are examples of numerical data.

The average score for a class of 30 students was 75.The 20 male students in the class averaged 70.The 10 female students in the class averaged

Which of the following are the three most common measures of central tendency?

Assume that the histogram of a data set is symmetric and bell shaped,with a mean of 75 and standard deviation of 10.Then,approximately 95% of the data values were between 55 and 95.

In the term "frequency table," frequency refers to the counts of observations in specified categories.

With symmetric,"bell-shaped" distributions,approximately what percent of the observations are within two standard deviations of the mean?

The length of the box in the box plot portrays the

Categorical variables can be classified as either discrete or continuous.

Abby has been keeping track of what she spends to rent movies.The last seven week's expenditures,in dollars,were 6,4,8,9,6,12,and 4.The mean amount Abby spends on renting movies is $7.

Data can be categorized as cross-sectional or time series.

A data set is typically a rectangular array of data,with observations in columns and variables in rows.

A population includes all elements or objects of interest in a study,whereas a sample is a subset of the population used to gain insights into the characteristics of the population.