West B Math: Data Analysis and Statistics Flashcards

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

Answer: 6

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

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

Answer: Sales increased consistently over the period.

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

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

Answer: 83

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

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

Answer: Line graph

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

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?

Answer: It raises the mean above most values.

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

In a frequency table, the frequency column shows:

Answer: How many times each value or category occurs

Frequency in a table represents the count — the number of times each specific value or category appears in the data.