Measures Of Central Tendencies Flashcards
What are the three main measures of central tendency?
Mean, median, and mode.
True or False: The mean is always the best measure of central tendency.
False.
Fill in the blank: The _____ is the value that appears most frequently in a data set.
mode
Which measure of central tendency is most affected by outliers?
Mean.
What is the median of the following data set: 3, 1, 4, 2, 5?
3.
In a perfectly symmetrical distribution, what is the relationship between the mean, median, and mode?
They are all equal.
True or False: The median is a better measure of central tendency than the mean in skewed distributions.
True.
What is the mode of the data set: 7, 8, 9, 9, 10?
9.
In a data set, if there are two modes, what is this called?
Bimodal.
What measure of central tendency is calculated by summing all values and dividing by the number of values?
Mean.
Fill in the blank: The _____ is the middle value when the data set is ordered.
median
What is the primary use of the mode in data analysis?
To identify the most common value.
True or False: The mean can be used for ordinal data.
False.
What type of data is best represented by the median?
Ordinal and skewed data.
How do you find the median in a data set with an even number of observations?
Average the two middle numbers.
What is an advantage of using the median over the mean?
It is not affected by outliers.
Fill in the blank: The _____ is sensitive to extreme values.
mean
What is the mode of the data set: 1, 2, 2, 3, 4, 4, 4?
4.
True or False: The mean and median can be the same in any data set.
False.
What is the relationship between mean, median, and mode in a left-skewed distribution?
Mean < Median < Mode.
What is the measure of central tendency that can be used for nominal data?
Mode.
Fill in the blank: The _____ is the average of a data set.
mean
What is the median of the data set: 10, 20, 30, 40?
25.
How can you identify the mode in a data set?
By finding the value that occurs most frequently.
