Question 1

The purpose of inferential statistics is to:

Accepted Answer

Make predictions about a population from a sample

Answer

Summarize historical data

Answer

Visualize data patterns

Answer

Analyze the entire population directly

Question 2

A probability value must always lie between:

Accepted Answer

0 and 1

Answer

0 and infinity

Answer

-∞ and +∞

Answer

-1 and 1

Question 3

If events A and B are mutually exclusive, the probability of A ∩ B is:

Accepted Answer

0

Answer

P(A)+ P(B)

Answer

1

Answer

P(A)× P(B)

Question 4

If P(A|B) = 0.7, what does it mean?

Accepted Answer

Probability of A given B has occurred is 0.7

Answer

Probability of A and B occurring together is 0.7

Answer

Event A occurs with event B 70% of the time

Answer

Event A occurs 70% of the time

Question 5

A company conducts a survey where 80% of respondents prefer online shopping, and 50% of respondents are women. If these two events are independent, what is the probability that a randomly selected respondent is a woman who prefers online shopping?

Accepted Answer

0.4

Answer

0.1

Answer

0.3

Answer

0.5

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