STAT Analysis of Tables and Charts 5

Question 1

A bar chart shows that Store A's revenue was $80K in Q1 and $100K in Q2. Store B's revenue was $60K in Q1 and $90K in Q2. Which store had the greater percentage increase in revenue?

Accepted Answer

Store B, with 50%

Answer

Store A: (20/80)×100 = 25%; Store B: (30/60)×100 = 50%; Store B had the greater percentage increase.

Question 2

A table lists the number of books read per month by five people: 2, 5, 3, 5, 5. What is the mode?

Accepted Answer

5

Answer

The value 5 appears three times, more than any other value, making it the mode.

Question 3

A chart shows that the number of website visitors doubled each month for 4 months starting at 1,000. Which type of graph would best show this exponential growth?

Accepted Answer

A bar chart with a logarithmic y-axis

Answer

A logarithmic y-axis converts exponential growth into a straight line, making the pattern clearer than a standard linear scale.

Question 4

A grouped frequency table shows heights of students. The class with the highest frequency is 160-169 cm with 18 students. Which term describes this class?

Accepted Answer

Modal class

Answer

The modal class is the class interval with the highest frequency, which is 160-169 cm with 18 students.

Question 5

A chart compares the number of hours studied vs. exam scores for 10 students. As hours studied increase from 1 to 8, scores increase from 45 to 90, but a student who studied 10 hours scored only 70. This outlier most likely indicates:

Accepted Answer

An unusual case that doesn't follow the general trend

Answer

A single data point that deviates substantially from the general trend is an outlier and doesn't invalidate the overall pattern.

STAT - Special Tertiary Admissions Test Practice Test

STAT - Special Tertiary Admissions Test Practice Test

STAT Analysis of Tables and Charts 5