KYOTE Statistics and Probability 3

Question 1

A frequency table shows that 15 out of 60 students prefer math. What is the relative frequency?

Accepted Answer

25%

Answer

15%

Answer

40%

Answer

45%

Question 2

In a class of 30 students, 18 play sports and 12 play music. If 6 students play both, how many play neither?

Accepted Answer

6

Answer

0

Answer

3

Answer

12

Question 3

In a normal distribution, approximately what percentage of data falls within one standard deviation of the mean?

Accepted Answer

68%

Answer

50%

Answer

95%

Answer

99.7%

Question 4

Which sampling method involves selecting every 10th person from an ordered list?

Accepted Answer

Systematic sampling

Answer

Random sampling

Answer

Stratified sampling

Answer

Cluster sampling

Question 5

A die is rolled 60 times and lands on 3 exactly 12 times. What is the experimental probability of rolling a 3?

Accepted Answer

1/5

Answer

1/6

Answer

1/4

Answer

1/3

Question 6

A two-way table shows 40 female students prefer science out of 50 total female students. What is the probability that a randomly selected female prefers science?

Accepted Answer

4/5

Answer

2/5

Answer

1/2

Answer

2/3

Question 7

A data set has a mean of 50 and a standard deviation of 5. Which value is exactly 2 standard deviations above the mean?

Accepted Answer

60

Answer

55

Answer

65

Answer

70