Statistical Notation and Frequency Distribution

What does the symbol ∑X represent in statistics?

• The sample size

• The mean of scores

• The sum of all scores

• The frequency of scores

In statistics, N refers to:

• The number of individual in sample

• The sample mean

• The population size

• The number of frequency values

What is the main purpose of a frequency distribution table?

• To calculate the standard deviation

• To summarise how often each score appears

• To find the median

• To determine the correlation between variables

A bar chart is most appropriate for which type of data?

• Interval data

• Ordinal data

• Nominal data

• Ratio data

A histogram is best used for:

• Categorical variables

• Discrete data

• Continuous data

• Nominal data

What is the correct way to calculate percentage from frequency data?

• (f / n) × 100

• (f + n) × 100

• f × 100

• (n / f) × 100

If you are given the following scores: 3, 3, 4, 4, 4, 5, 5, what is the frequency of the score 4?

• 1

• 2

• 3

• 4

Which of the following is NOT part of the steps to create a frequency distribution table?

• List all unique scores

• Count how many times each score appears

• Add scores together

• Calculate proportion and percentage

What does a proportion tell us in a frequency distribution?

• Total number of scores

• How a single score compares to the average

• The fraction of the total that a score represents

• The shape of the distribution

In a histogram, what do the width and height of each bar represent?

• Width = frequency, Height = class interval

• Width = category name, Height = percentage

• Width = class interval, Height = frequency

• Width = mean, Height = median