Unit 10 : Data and Statistics

Front

What is systematic sampling?

Back

A sampling method where every nth individual is selected from a list or sequence.

Front

What is the least valid sampling method when testing a product?

Back

Selecting one box randomly and then selecting all the bulbs from the box.

Front

What is an experiment in the context of data and statistics?

Back

A study where conditions are controlled to test a hypothesis.

Front

What is an unbiased sample?

Back

A sample that fairly represents the population, without favoritism or bias.

Front

What is a z-score?

Back

A statistical measurement that describes a value's relation to the mean of a group of values.

Front

How do you calculate the x-value from a z-score?

Back

x = (z * standard deviation) + mean.

Front

What is the mean in a data set?

Back

The average value, calculated by adding all values and dividing by the number of values.

Front

What is standard deviation?

Back

A measure of the amount of variation or dispersion in a set of values.

Front

What is the purpose of a survey in data collection?

Back

To gather information from a sample of individuals to make inferences about a larger population.

Front

What is a biased sample?

Back

A sample that does not accurately represent the population, leading to skewed results.