EOC EOC Statistics and Probability 2

Question 1

What is 'standard deviation' a measure of?

Accepted Answer

How spread out values are from the mean

Answer

Standard deviation measures how much individual data points in a set deviate or differ from the mean, indicating variability or spread.

Question 2

If two events are independent, how is the probability that both occur calculated?

Accepted Answer

By multiplying their individual probabilities

Answer

For independent events, the probability that both occur equals the product of their individual probabilities: P(A and B) = P(A) × P(B).

Question 3

A scatter plot shows data points clustered closely along a line going from lower-left to upper-right. What does this indicate?

Accepted Answer

A strong positive correlation

Answer

When data points cluster closely around a line that rises from left to right, it indicates a strong positive correlation between the two variables.

Question 4

What is the 'mode' of a data set?

Accepted Answer

The most frequently occurring value

Answer

The mode is the value that appears most often in a data set, and a data set can have one mode, multiple modes, or no mode at all.

Question 5

Which measure of central tendency is most affected by extreme outliers in a data set?

Accepted Answer

Mean

Answer

The mean is most sensitive to outliers because it uses every value in its calculation, so a very large or small value can significantly shift the average.

EOC - End-of-Course Test Practice Test

EOC - End-of-Course Test Practice Test

EOC EOC Statistics and Probability 2