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Data Analysis Flashcards

7 cards from real CHSPE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Data Analysis flashcards as text

  1. Which measure of central tendency is most useful when data includes extreme outliers?

    Answer: Median

    The median is resistant to outliers, making it more representative of the center when extreme values are present.

  2. A survey asks students to rate school lunch from 1 to 5. The ratings are: 2, 3, 3, 4, 4, 4, 5. What is the mean rating?

    Answer: 3.57

    (2+3+3+4+4+4+5) ÷ 7 = 25 ÷ 7 ≈ 3.57.

  3. A relative frequency table shows that 0.45 of students prefer soccer. Out of 400 students, how many prefer soccer?

    Answer: 180

    0.45 × 400 = 180 students prefer soccer.

  4. Which of the following is an example of categorical data?

    Answer: Favorite color of each student

    Categorical data sorts individuals into groups or categories, such as colors, rather than measuring a numeric quantity.

  5. A data set has Q1 = 20 and Q3 = 35. What is the IQR, and which value would be considered an outlier?

    Answer: IQR = 15; outlier below 5 or above 57.5

    IQR = 35 − 20 = 15; outlier boundaries are Q1 − 1.5×IQR = 20 − 22.5 = −2.5 and Q3 + 1.5×IQR = 35 + 22.5 = 57.5.

  6. A spinner has 4 equal sections: red, blue, green, yellow. What is the probability of NOT landing on red?

    Answer: 3/4

    P(not red) = 1 − P(red) = 1 − 1/4 = 3/4.

  7. A double bar graph compares boys' and girls' favorite subjects. Which conclusion can be drawn if the math bars are equal in height?

    Answer: Boys and girls favor math equally

    Equal bar heights represent equal frequencies or percentages, indicating boys and girls favor math at the same rate.