Frequency, Relative Frequency and Level of Measurement Flashcards
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What is Frequency?
How many times something happens on a data set
True or False: Frequency can only refer to numerical data.
False. Frequency can refer to both numerical and categorical data.
What is relative frequency?
Relative frequency is the ratio of the absolute frequency of a value to the total number of observations.
Multiple Choice: Which of the following defines cumulative frequency?
A. The total frequency of all values up to and including a specific value.
What is the formula for calculating relative frequency?
Relative frequency = (Absolute frequency / Total number of observations) x 100%
True or False: A frequency distribution can be represented using a table or a graph.
True.
What type of graph is commonly used to represent frequency distributions?
Histograms.
Fill in the blank: In a frequency table, the _____ column lists the categories or values.
category
What does a higher frequency indicate in a dataset?
A higher frequency indicates that a particular value or category occurs more often.
Multiple Choice: Which of the following is an example of categorical frequency?
C. The number of students in each grade level.
What is the purpose of a frequency distribution?
To summarize and organize data to show the number of occurrences of each value.
Multiple Choice: Which statistical measure uses frequency to identify the most common value?
B. Mode.
True or False: Frequency analysis is only useful in scientific research.
False. Frequency analysis is used in various fields including marketing, economics, and social sciences.
What is a frequency chart?
A frequency chart is a visual representation that displays the frequency of different values or categories.
Multiple Choice: Which of the following is NOT a type of frequency?
C. Imaginary frequency.
What is the relationship between frequency and probability?
Frequency can be used to estimate the probability of an event occurring based on past occurrences.
True or False: Cumulative frequency is the total frequency up to a certain point in a data set.
True
Fill in the blank: The relative frequency is calculated by dividing the frequency of a specific category by the ________ of all frequencies.
total frequency
What is the formula for calculating relative frequency?
Relative Frequency = Frequency of the category / Total Frequency
Which of the following is an example of frequency? A) 5 students scored 90%, B) The average score was 75%, C) The median score was 80%.
A) 5 students scored 90%
What does cumulative frequency represent?
Cumulative frequency represents the sum of frequencies for all categories up to a certain category.
If a data set has a total of 50 observations, and a value occurs 10 times, what is its relative frequency?
0.2 or 20%
Fill in the blank: In a frequency distribution, the values are typically organized in a ________.
table
What is the main purpose of calculating relative frequency?
To understand the proportion of each category in relation to the total.
How do you compute cumulative frequency from a frequency table?
By adding the frequency of each category to the cumulative total of the previous categories.
Multiple Choice: Which of the following represents a cumulative frequency? A) 10, B) 20, C) 10, 30, 50.
C) 10, 30, 50
Fill in the blank: The cumulative frequency at the last category is equal to the ________ of the data set.
total frequency
What does a frequency distribution show?
A frequency distribution shows how often each value in a data set occurs.
What is the relative frequency of a category if it has a frequency of 15 and the total frequency is 60?
0.25 or 25%
In a data set with categories A, B, and C, if the frequencies are 10, 20, and 30 respectively, what is the cumulative frequency for category B?
30
True or False: A higher relative frequency indicates a less common occurrence in the data set.
False
What is the main advantage of using relative frequency?
It allows for comparison between different data sets with varying total sizes.
What is a fun trivia fact about frequency in statistics?
The concept of frequency dates back to the early days of statistics, used by astronomers to track celestial events.
