Probability and Statistics Flashcard

Front

What is the probability of rolling a 1 or a number greater than 3 on a die?

Back

The probability is 2/3.

Front

How do you find the median of a set of numbers?

Back

Arrange the numbers in order and find the middle value. If there is an even number of values, average the two middle values.

Front

What percentage of data falls within one standard deviation of the mean in a normal distribution?

Back

Approximately 68.26%.

Front

What is the range in a data set?

Back

The range is the difference between the highest and lowest values.

Front

What is the interquartile range (IQR)?

Back

The IQR is the difference between the first quartile (Q1) and the third quartile (Q3) in a data set.

Front

How do you calculate the IQR?

Back

IQR = Q3 - Q1.

Front

What is a normal distribution?

Back

A normal distribution is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence.

Front

What does it mean if a distribution has a small IQR?

Back

A small IQR indicates that the middle 50% of the data points are close together, suggesting less variability.

Front

What is the formula for calculating probability?

Back

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

Front

What is the difference between descriptive and inferential statistics?

Back

Descriptive statistics summarize data, while inferential statistics make predictions or inferences about a population based on a sample.