Rise Placement Test Statistics and Data Analysis 3

Question 1

A histogram shows data grouped into intervals. Which of the following CANNOT be easily determined from a histogram?

Accepted Answer

Exact individual data values

Answer

Histograms display grouped frequencies, so exact individual values within each interval are not visible.

Question 2

A study finds that cities with more hospitals have higher death rates. Which conclusion is most appropriate?

Accepted Answer

Correlation does not imply causation

Answer

This is a classic example of a confounding variable (larger populations have both more hospitals and more deaths); correlation does not prove causation.

Question 3

A researcher wants to survey 200 students about lunch preferences and randomly selects students from an alphabetical list at every 10th name. This is an example of:

Accepted Answer

Systematic sampling

Answer

Selecting every nth item from a list is the defining feature of systematic sampling.

Question 4

A graph shows average income rising while the y-axis starts at $50,000 instead of $0. This technique is often used to:

Accepted Answer

Exaggerate the visual appearance of growth

Answer

Starting a y-axis above zero compresses the scale and makes small changes appear much larger than they really are.

Question 5

A two-way table shows 120 students surveyed about pets. 60 own dogs, 40 own cats, and 20 own both. How many own neither?

Accepted Answer

40

Answer

Using inclusion-exclusion: owners of at least one pet = 60+40−20 = 80; neither = 120−80 = 40.

Rise Placement Test Practice Test

Rise Placement Test Practice Test

Rise Placement Test Statistics and Data Analysis 3