Statistics and Data Analysis

Front

What is the mean of a set of numbers?

Back

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

Front

How do you calculate the mean of these numbers: 5, 11, 2, 12, 4, 2?

Back

Add the numbers: 5 + 11 + 2 + 12 + 4 + 2 = 36. Then divide by the count of numbers (6): 36 / 6 = 6.

Front

What is a mode in statistics?

Back

The mode is the number that appears most frequently in a data set.

Front

What is the mode of the scores: 24, 14, 34, 30?

Back

The mode is 24, as it appears most frequently.

Front

What is a box and whisker plot?

Back

A box and whisker plot is a graphical representation of a data set that shows its minimum, first quartile, median, third quartile, and maximum.

Front

What is the five-number summary?

Back

The five-number summary includes the minimum, first quartile (Q1), median (Q2), third quartile (Q3), and maximum of a data set.

Front

What does it mean if a forecast calls for rain and it actually rains 90% of the time?

Back

It means that the forecast is very reliable, as it accurately predicts rain 90% of the time.

Front

What is data analysis?

Back

Data analysis is the process of inspecting, cleaning, transforming, and modeling data to discover useful information and support decision-making.

Front

What is the purpose of using intervals in data analysis?

Back

Intervals help to group data into ranges, making it easier to analyze and interpret large sets of data.

Front

How do you determine the interval with the most employees from a frequency distribution?

Back

Look for the interval with the highest frequency count, which indicates the range with the most employees.