SC READY Data Analysis, Statistics & Probability 3

Question 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?

Accepted Answer

Positive correlation

Answer

Negative correlation

Answer

No correlation

Answer

Inverse correlation

Question 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?

Accepted Answer

Random sample

Answer

Census

Answer

Convenience sample

Answer

Biased sample

Question 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?

Accepted Answer

Median

Answer

Mean

Answer

Mode

Answer

Range

Question 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?

Accepted Answer

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

Answer

The number cube is definitely unfair

Answer

The experimental results exactly match theoretical probability

Answer

Rolling more times would not change anything

Question 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?

Accepted Answer

600

Answer

550

Answer

650

Answer

700

Question 6

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

Accepted Answer

Line graph

Answer

Pie chart

Answer

Bar graph

Answer

Stem-and-leaf plot

Question 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?

Accepted Answer

4/9

Answer

5/10

Answer

4/10

Answer

5/9