Statistics Midterm Review

Front

What is the mode in a data set?

Back

The mode is the most common or most frequent value in a data set.

Front

What is the most likely height of a tree if the average height is around 12 feet?

Back

12 feet is the most likely height based on the average.

Front

In a normal distribution, between what two standard deviations does 95% of the data lie?

Back

95% of the data lies between two standard deviations below and two standard deviations above the mean.

Front

Given a mean of 75 and a standard deviation of 7, what percentage of scores are above 82?

Back

16% of scores are above 82.

Front

How many times were 6-8 goals scored in the data set: 3, 5, 2, 5, 4, 7, 1, 0, 6, 4, 8, 5, 3, 2, 4, 5, 9?

Back

3 times.

Front

What is the definition of standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

Front

What does it mean if a data set is normally distributed?

Back

A normally distributed data set has a symmetric bell-shaped curve where most of the observations cluster around the central peak.

Front

What is the difference between mean and median?

Back

The mean is the average of a data set, while the median is the middle value when the data set is ordered.

Front

What is a sample in statistics?

Back

A sample is a subset of a population used to represent the entire group.

Front

What is the purpose of a histogram?

Back

A histogram is used to represent the frequency distribution of numerical data.