STAT 211 EXAM PREP QUESTIONS AND
100% CORRECT ANSWERS!!
A recent newspaper article reported on Americans' eating habits. The article reported that
only about one third of American adults ate 2 or more servings of fruit per day, and only
26% ate 3 or more servings of vegetables per day. Californians ate the most fruit, while
Tennesseans ate the most vegetables.
The state that a respondent lived in is ___________ variable.
categorial
A recent newspaper article reported on Americans' eating habits. The article reported that
only about one third of American adults ate 2 or more servings of fruit per day, and only
26% ate 3 or more servings of vegetables per day. Californians ate the most fruit, while
Tennesseans ate the most vegetables.
The population in this study was ______________________.
American Adults
A
In a question asked, "With your dinner, do you usually drink soda, milk, water, other, and
no response, What kind of variable is the response?
Ordinal
Quantitative variable
Categorical variable
Identifier
Categorial variabele
A histogram that looks pretty much the same on the left side as the right side (think of
folding it down the middle) is called _______.
symmetric
A meteorologist preparing a talk about global warming compiled a list of weekly low
temperatures (in degrees Fahrenheit) he observed at his southern home last year. The
,coldest temperature for any week was
36 degrees°F,
but he inadvertently recorded the Celsius value of
2 degrees°.
Assuming that he correctly listed all the other temperatures, explain how this error will
affect a) measures of center, the mean and median, and b) measures of spread, the range,
IQR, and standard deviation.
The mean will _______ and the median will _______.
Part 2
b) The range will _________ the IQR will ___________, and the standard deviation will
___________r.
a) be lower, not be affected
b) be higher, will not be affected, be higher
A coffee shop next to a university surveys potential customers: students selected randomly
walking onto campus. The survey asked students where they live, whether they study at the
library, and their weekly food budget.
A student's weekly food budget is a ___________ variable.
quantitative
Which of the following is not necessarily an outlier?
tom
A.
The maximum value in a dataset
B.
A number which is more than 1.5times•IQR from either end of the box in a box plot
C.
An extreme value that doesn't seem to belong to the rest of the data
A. The maximum value in a dataset
, A standardized value is a value found by which of the following?
A.
Computing the mode
B.
Subtracting the mean from the value and then dividing the result by the standard deviation
of the dataset
C.
Dividing the value by the standard deviation of the dataset
D.
Comparing the value with the other values in the dataset
E.
Subtracting the value from the mean of the dataset
B. Subtracting the mean from the value and then dividing the result by the standard deviation of
the dataset
A pharmaceutical company conducts an experiment in which a subject takes 50 mg of a
substance orally. The researchers measure how many hours it takes for one-quarter or
quarter of the substance to exit the bloodstream. What kind of variable is the company
studying?
quantitative variable
Which of the following is not necessarily an outlier?
A,
The maximum value in a dataset
B.
An extreme value that doesn't seem to belong to the rest of the data
C.
A number which is more than 1.5times•IQR from either end of the box in a box plot
100% CORRECT ANSWERS!!
A recent newspaper article reported on Americans' eating habits. The article reported that
only about one third of American adults ate 2 or more servings of fruit per day, and only
26% ate 3 or more servings of vegetables per day. Californians ate the most fruit, while
Tennesseans ate the most vegetables.
The state that a respondent lived in is ___________ variable.
categorial
A recent newspaper article reported on Americans' eating habits. The article reported that
only about one third of American adults ate 2 or more servings of fruit per day, and only
26% ate 3 or more servings of vegetables per day. Californians ate the most fruit, while
Tennesseans ate the most vegetables.
The population in this study was ______________________.
American Adults
A
In a question asked, "With your dinner, do you usually drink soda, milk, water, other, and
no response, What kind of variable is the response?
Ordinal
Quantitative variable
Categorical variable
Identifier
Categorial variabele
A histogram that looks pretty much the same on the left side as the right side (think of
folding it down the middle) is called _______.
symmetric
A meteorologist preparing a talk about global warming compiled a list of weekly low
temperatures (in degrees Fahrenheit) he observed at his southern home last year. The
,coldest temperature for any week was
36 degrees°F,
but he inadvertently recorded the Celsius value of
2 degrees°.
Assuming that he correctly listed all the other temperatures, explain how this error will
affect a) measures of center, the mean and median, and b) measures of spread, the range,
IQR, and standard deviation.
The mean will _______ and the median will _______.
Part 2
b) The range will _________ the IQR will ___________, and the standard deviation will
___________r.
a) be lower, not be affected
b) be higher, will not be affected, be higher
A coffee shop next to a university surveys potential customers: students selected randomly
walking onto campus. The survey asked students where they live, whether they study at the
library, and their weekly food budget.
A student's weekly food budget is a ___________ variable.
quantitative
Which of the following is not necessarily an outlier?
tom
A.
The maximum value in a dataset
B.
A number which is more than 1.5times•IQR from either end of the box in a box plot
C.
An extreme value that doesn't seem to belong to the rest of the data
A. The maximum value in a dataset
, A standardized value is a value found by which of the following?
A.
Computing the mode
B.
Subtracting the mean from the value and then dividing the result by the standard deviation
of the dataset
C.
Dividing the value by the standard deviation of the dataset
D.
Comparing the value with the other values in the dataset
E.
Subtracting the value from the mean of the dataset
B. Subtracting the mean from the value and then dividing the result by the standard deviation of
the dataset
A pharmaceutical company conducts an experiment in which a subject takes 50 mg of a
substance orally. The researchers measure how many hours it takes for one-quarter or
quarter of the substance to exit the bloodstream. What kind of variable is the company
studying?
quantitative variable
Which of the following is not necessarily an outlier?
A,
The maximum value in a dataset
B.
An extreme value that doesn't seem to belong to the rest of the data
C.
A number which is more than 1.5times•IQR from either end of the box in a box plot
