MATH168 Chapter 1-2 Exam Practice

A high school senior is collecting data on the colleges in which she is interested. Identify the variables as either categorical or quantitative.

Type of college: Private or Public college

• categorical

• quantitative

• neither

• both

A high school senior is collecting data on the colleges in which she is interested. Identify the variables as either categorical or quantitative.

Tuition: in thousands of dollars

• categorical

• quantitative

• neither

• both

A high school senior is collecting data on the colleges in which she is interested. Identify the variables as either categorical or quantitative.

Zip Code: the zip code of the part of the country in which the college is located

• categorical

• quantitative

• neither

• both

A high school senior is collecting data on the colleges in which she is interested, including the following variables: Type of college, Tuition, State, Enrollment, Student-Faculty Ratio, Graduation Rate

What are the cases in the high school senior's dataset?

• Colleges

• Tuitions

• Graduation Rate

• State

The ________ variable is used to understand or predict values of the ________ variable.

​ (a)   ​ (b)  

• Explanatory
• Response
• categorical
• quantitative
• r-value

Match the following

• sample proportion

• r

• Sample mean

• Mu

• Population proportion

• x-bar

• Population mean

• p

• correlation coefficient

• p-hat

A ​ (a)   includes ​ (b)   individuals or objects of interest.

• population
• sample
• all
• most

State whether the data are best described as a population or a sample

The makers of M&M's state that when they package their candies they thoroughly mix the colored candies together and randomly put them into packages. A student purchases a bag of Milk Chocolate M&M's from the vending machine.

• population

• sample

State whether the data are best described as a population or a sample

A football fan recorded the number of rushing yards for all NFL running backs who played last season.

• population

• sample

Organize these options into the right categories

Groups:

(a) Sample

,

(b) Population

,

(c) Biased

,

(d) Best point estimates

• 3 states in south

• last 5 cars that drove by me

• mean value of 12 pounds

• 26 letters of the alphabet

• non random assignment of explanatory variable

• 100 fish taken from a lake

• asking question about exercise in front of gym

• email survey

• phat =0.27

• difference in mean ages for sample of stats students

• ALL LCCC professors