UNIT 1 REVIEW

Front

What is the mean of a data set?

Back

The mean is the average of a set of numbers, calculated by adding all the numbers together and dividing by the count of numbers.

Front

How do you calculate the mean for the data set: 1, 78, 88, 89, 99, 100?

Back

Mean = (1 + 78 + 88 + 89 + 99 + 100) / 6 = 75.83 (rounded to 2 decimal places).

Front

What is variability in statistics?

Back

Variability refers to how spread out or dispersed the values in a data set are. It indicates the degree of difference among the data points.

Front

Which store has higher variability in their prices: Bookstore A or Bookstore B?

Back

Bookstore B has higher variability in their prices.

Front

What is the median in a data set?

Back

The median is the middle value when the numbers are arranged in order. If there is an even number of values, the median is the average of the two middle numbers.

Front

What is the median of the box plot data: 20, 30, 62, 70?

Back

The median is 62.

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, showing the frequency of data points within specified ranges (intervals).

Front

What is the most appropriate first interval for a histogram of the data: 12, 24, 56, 7, 34, 75, 86, 78, 96?

Back

The most appropriate first interval is 0-10.

Front

What is the formula for calculating the mean?

Back

Mean = (Sum of all values) / (Number of values).

Front

What is the mean of the data set: 90, 95, 85?

Back

Mean = (90 + 95 + 85) / 3 = 90.