M3
Define 'mean, median, and mode'
Mean: measure of central tendency (average)
Median: the middle score
Mode: score that occurs most frequently
What is a population?
A population consists of ALL subjects under a study.
What are the two types of research approaches?
Qualitative and Quantitative
How many levels of measurement are there?
Four
Is the data discrete or continious, "the number of students at the SI session"?
Discrete.
What is 95
What is a sample?
It is a subset, or part, of a population.
What is the definition of a qualitative variable?
Variables that have distinct categories according to some characteristic or attribute. The values of the variable consist of attributes, labels, or non numerical entries.
What are the 4 levels of measurement?
Nominal, Ordinal, Interval, Ratio
Is age considered a qualitative or quantitative variable?
Quantitative
What is the median of 22, 8, 11, 10, 77, 32, 47, 87
What is '27'
What are some ways you can show the results of descriptive statistics?
Tables, charts, graphs.
What is the definition of a quantitative variable?
A variable that can be counted or measured. The values of the variable are numerical measurements or counts.
Telephone number, social security number, hair color, gender, major, nationality, blood type ect.
In 2025, the world population is predicted to be 8 billion people. Were descriptive or inferential statistics used to reach this conclusion?
Inferential
What is the mode of 9, 20, 3, 66, 6, 11, 72, 3, 82, 4, 82, 20, 11, 3
What is '3'
What is the definition of inferential statistic?
Inferential statistics involves using sample data to make conclusions about a population. Probability is often used.
What is a discrete variable?
Values that can be counted.
What is the definition of ordinal measurement?
Data that can be arranged in order, or ranked. The differences between the data entries are not meaningful?
Select the correct level of measurement given the following statement. "Temperatures of newborn babies."
Interval
Find the mean, median, and mode of:
22, 53, 57, 116, 98, 103, 108, 98, 93, 121, 40
Round up to the nearest tenth
Mean: 82.6
Median: 98
Mode: 98
How do descriptive and inferential statistics differ?
Descriptive statistics only attempt to describe data, while inferential statistics attempt to make predictions based on data.
What is a continuous variable?
A variable that can assume an infinite number of values between any two specific values.
What is the difference between interval and ratio levels of measurement?
Interval level of measurement has no true zero, but for ratio level of measurement a true zero exists.
Is height a ratio or continuous variable?
Continuous.
Bonus 100: why is height not a ratio variable?