TCAP Data Analysis 2

Question 1

A stem-and-leaf plot shows the following data: 3|2 5 8, 4|1 4 7 9, 5|0 3. What is the median of this data set?

Accepted Answer

44

Answer

Listing all values in order: 32, 35, 38, 41, 44, 47, 49, 50, 53 — the middle (5th) value is 44.

Question 2

A survey asked 80 students to pick their favorite school subject. If 20% chose Math, how many students chose Math?

Accepted Answer

16

Answer

20% of 80 = 0.20 × 80 = 16 students.

Question 3

Which measure of central tendency is most affected by an outlier in a data set?

Accepted Answer

Mean

Answer

The mean uses all values in its calculation, so an extreme outlier shifts it significantly.

Question 4

A line graph shows a company's sales rising from $200 in January to $350 in June. What is the overall change in sales?

Accepted Answer

$150

Answer

$350 − $200 = $150 increase over the six-month period.

Question 5

In a frequency table, the category 'Blue' has a frequency of 15 out of 60 total responses. What is the relative frequency?

Accepted Answer

25%

Answer

15 ÷ 60 = 0.25, which equals 25%.

(TCAP) Tennessee Comprehensive Assessment Program Practice Test