Data Analysis Practice Test

Front

What is the definition of percentage?

Back

A percentage is a fraction expressed as a part of 100. It represents how much of a whole is being considered.

Front

How do you calculate the percentage of a subset within a total?

Back

To calculate the percentage of a subset, divide the number of items in the subset by the total number of items and multiply by 100.

Front

What is the definition of probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

How do you calculate the probability of an event?

Back

Probability = (Number of favorable outcomes) / (Total number of possible outcomes).

Front

What is the theoretical probability of an event?

Back

Theoretical probability is the probability calculated based on the possible outcomes in a perfect scenario, without any experimental data.

Front

What is an interquartile range (IQR)?

Back

The interquartile range (IQR) is a measure of statistical dispersion, calculated as the difference between the third quartile (Q3) and the first quartile (Q1).

Front

How do you find the IQR of a data set?

Back

To find the IQR, first determine Q1 and Q3, then subtract Q1 from Q3: IQR = Q3 - Q1.

Front

What is a spinner in probability?

Back

A spinner is a circular device divided into sections, each representing a different outcome, used to demonstrate probability.

Front

What does it mean to replace an item in probability?

Back

Replacing an item means putting it back into the sample space after it has been selected, keeping the total number of items constant.

Front

What is a sample space in probability?

Back

The sample space is the set of all possible outcomes of a probability experiment.