Statistics basics quick check
1. What is a statistic?
A statistic is a numerical value or measure that describes a characteristic of a sample.
2. What is the difference between a population and a sample?
A population is the entire group that we are interested in studying, while a sample is a smaller subset of the population that is used to make inferences about the population as a whole.
3. What is the purpose of descriptive statistics?
Descriptive statistics are used to summarize and describe the important characteristics of a dataset, such as the mean, median, and standard deviation.
4. What is the purpose of inferential statistics?
Inferential statistics are used to make predictions or inferences about a population based on a sample of data.
5. What are some common measures of central tendency?
Some common measures of central tendency include the mean, median, and mode.
6. What is variability in statistics?
Variability refers to how spread out the data points are in a dataset. It can be measured using statistics such as the range, variance, and standard deviation.
7. What is a frequency distribution?
A frequency distribution is a table or graph that shows how often different values occur in a dataset.
8. What is a normal distribution?
A normal distribution is a symmetrical bell-shaped curve that represents the distribution of data around a central mean value. Many natural processes and characteristics in nature tend to follow a normal distribution.