Remedial Exam

What is the primary purpose of descriptive statistics?

• To summarize and organize data

• To make predictions about a population

• To test hypotheses

• To determine causation

Which of the following is NOT a measure of central tendency?

• Mean

• Mode

• Median

• Range

In probability, an event with a probability of 1 means _

• It is likely to happen

• It is unlikely to happen

• It will definitely happen

• It will never happen

Which probability concept calculates the likelihood of an event based on historical data?

• Classical Probability

• Empirical Probability

• Subjective Probability

• Theoretical Probability

In a normal distribution, the data is

• Skewed to the right

• Symmetrical around the mean

• Skewed to the left

• Randomly distributed

Which of the following is true about the mean in a perfectly normal distribution?

• It is greater than the median

• It is equal to the mode

• It is lower than the mode

• It has no relation to the median

If a dataset has outliers, which measure of central tendency is most affected?

• Mean

• Median

• Mode

• Range

Conditional probability is used when _

• Two events are unrelated

• Two events are dependent

• Two events cannot happen at the same time

• All possible outcomes are known

The area under a normal curve represents _

• A single probability

• All possible probabilities, totaling 1

• Probabilities less than 1

• Only the probabilities above the mean

A probability of 0.2 represents a likelihood of _

• 80%

• 20%

• 50%

• 10%