Stats Test Review

Front

What is the mean in a normal distribution?

Back

The mean is the average value of a set of data points, representing the center of the distribution.

Front

What is the standard deviation in a normal distribution?

Back

The standard deviation measures the amount of variation or dispersion of a set of values from the mean.

Front

In a normal distribution, what percentage of data falls within one standard deviation of the mean?

Back

Approximately 68% of the data falls within one standard deviation of the mean.

Front

What percentage of data falls within two standard deviations of the mean in a normal distribution?

Back

Approximately 95% of the data falls within two standard deviations of the mean.

Front

What is the empirical rule in statistics?

Back

The empirical rule states that for a normal distribution, about 68% of the data falls within one standard deviation, 95% within two, and 99.7% within three standard deviations from the mean.

Front

What is a survey in research?

Back

A survey is a method of collecting data by asking questions to a sample of individuals to gather information about their opinions, behaviors, or characteristics.

Front

What is a skewed distribution?

Back

A skewed distribution is one where the data points are not symmetrically distributed around the mean, resulting in a longer tail on one side.

Front

What does it mean if data is skewed right?

Back

If data is skewed right, it means that the tail on the right side of the distribution is longer or fatter than the left side, indicating that there are a number of high values.

Front

What is a simple random sample?

Back

A simple random sample is a sampling method where every individual in the population has an equal chance of being selected.

Front

What is the difference between a sample and a population?

Back

A population includes all members of a specified group, while a sample is a subset of the population selected for analysis.