West B Test West B Math: Data Analysis and Statistics 2

Question 1

A data set has values: 4, 8, 6, 5, 3, 9, 7. What is the median?

Accepted Answer

6

Answer

Ordered: 3, 4, 5, 6, 7, 8, 9 — the middle (4th) value is 6.

Question 2

A line graph shows a company's monthly sales rising steadily from January to June. What does this trend indicate?

Accepted Answer

Sales increased consistently over the period.

Answer

A steadily rising line on a line graph indicates a consistent increase in the measured value over time.

Question 3

If a student scored 80 on three tests and 92 on one test, what is the mean score across all four tests?

Accepted Answer

83

Answer

Mean = (80+80+80+92) ÷ 4 = 332 ÷ 4 = 83.

Question 4

Which type of graph is best suited for showing how a quantity changes over time?

Accepted Answer

Line graph

Answer

Line graphs are specifically designed to display changes in a value over a continuous time period.

Question 5

A data set has an outlier that is much higher than the rest of the values. How does this outlier most likely affect the mean?

Accepted Answer

It raises the mean above most values.

Answer

A very high outlier pulls the mean upward because the mean includes every value in its calculation.

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