BMST Data Interpretation and Probability 3

Question 1

A scatter plot shows a strong positive correlation between study hours and test scores. What does this mean?

Accepted Answer

As study hours increase, scores tend to increase

Answer

As study hours increase, scores tend to decrease

Answer

Study hours have no effect on scores

Answer

Scores cause students to study more

Question 2

A deck of 52 cards. What is the probability of drawing a face card (Jack, Queen, King)?

Accepted Answer

3/13

Answer

1/4

Answer

1/13

Answer

3/52

Question 3

Data set: 5, 8, 8, 12, 15, 8, 20. What is the mode?

Accepted Answer

8

Answer

12

Answer

5

Answer

20

Question 4

A histogram shows class intervals 0–10, 10–20, 20–30, 30–40 with frequencies 5, 12, 8, 3. What percentage of data falls in the 10–20 interval?

Accepted Answer

42.86%

Answer

30%

Answer

37.5%

Answer

40%

Question 5

A box plot shows Q1=30, median=45, Q3=60. What is the interquartile range (IQR)?

Accepted Answer

30

Answer

45

Answer

15

Answer

60

Question 6

If you flip a fair coin 3 times, what is the probability of getting exactly 2 heads?

Accepted Answer

3/8

Answer

1/4

Answer

1/2

Answer

1/8

Question 7

A table shows defective items per day: Mon=4, Tue=7, Wed=3, Thu=6, Fri=5. What is the mean number of defects per day?

Accepted Answer

5

Answer

4

Answer

6

Answer

7