1st Semester Stats Final Part 1

Front

What is Undercoverage in survey sampling?

Back

Undercoverage occurs when some members of the population are inadequately represented in the sample, leading to biased results.

Front

What is Voluntary Response Bias?

Back

Voluntary Response Bias occurs when individuals can choose whether to participate in a survey, often leading to a sample that does not represent the population.

Front

What is Nonresponse Bias?

Back

Nonresponse Bias occurs when a significant number of selected participants do not respond to the survey, potentially skewing the results.

Front

What is Response Bias?

Back

Response Bias occurs when participants provide inaccurate or false responses, often due to misunderstanding the question or social desirability.

Front

How do you calculate the Interquartile Range (IQR)?

Back

IQR = Q3 - Q1, where Q3 is the third quartile and Q1 is the first quartile.

Front

What does a Boxplot represent?

Back

A Boxplot visually represents the five-number summary of a dataset: minimum, Q1, median, Q3, and maximum.

Front

What is the Empirical Rule in statistics?

Back

The Empirical Rule states that for a normal distribution, approximately 68% of data falls within one standard deviation of the mean, 95% within two, and 99.7% within three.

Front

What is the mean of a dataset?

Back

The mean is the average of a set of numbers, calculated by dividing the sum of all values by the number of values.

Front

What is a normal distribution?

Back

A normal distribution is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence.

Front

What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.