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Data Analysis, Statistics & Probability Flashcards

7 cards from real SC READY 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, Statistics & Probability flashcards as text

  1. A scatter plot comparing hours of study and test scores shows points trending upward from left to right. What type of correlation does this represent?

    Answer: Positive correlation

    When both variables increase together (more study hours → higher scores), the relationship is a positive correlation.

  2. A researcher polls 30 randomly selected students from a school of 600 about their lunch preference. This is an example of which sampling method?

    Answer: Random sample

    Randomly selecting students from the larger population is a random sample, which helps ensure results represent the whole school.

  3. A data set has the values 4, 6, 8, 10, 100. Which measure of center BEST represents the typical value in this data set?

    Answer: Median

    The outlier 100 skews the mean significantly, so the median (8) better represents the typical value in this data set.

  4. A student rolls a number cube (1–6) 60 times and gets a 3 exactly 12 times. The theoretical probability of rolling a 3 is 1/6. Which statement is BEST supported by these results?

    Answer: The experimental probability (12/60 = 1/5) differs slightly from the theoretical (1/6), which is normal

    Experimental probability rarely matches theoretical probability exactly; small differences are expected and normal with limited trials.

  5. A school graph shows enrollment increased from 400 in 2018 to 500 in 2023. If the trend continues at the same rate, what would the predicted enrollment be in 2028?

    Answer: 600

    Enrollment increased by 100 over 5 years; continuing at the same rate adds another 100 over the next 5 years: 500 + 100 = 600.

  6. Which of the following data displays would be MOST appropriate for showing how a student's reading speed changed over 6 months?

    Answer: Line graph

    A line graph is best for showing change over time because it connects data points to reveal trends across a continuous period.

  7. A jar contains 5 red, 3 yellow, and 2 green candies. Without replacing them, you draw a red candy first. What is the probability the second candy drawn is also red?

    Answer: 4/9

    After removing one red candy, there are 4 red candies left out of 9 total remaining, giving a probability of 4/9.

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Sources & references

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  1. ed.sc.gov — Test delivery, eligibility, passing score, test dates, time limit, exam information · verified Nov 2026
  2. wbte.drcedirect.com — Test delivery · verified Oct 2026