Inverse Normal Calculations 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

What does the 75th percentile represent in a data set?

Back

The 75th percentile is the value below which 75% of the data points fall.

Front

What is the total area under the standard normal distribution curve?

Back

1, which represents the total probability of all outcomes.

Front

What shape does a normal distribution curve have?

Back

A bell curve.

Front

What IQ score qualifies one to be in the top 2% for Mensa membership?

Back

An IQ score of 131 or higher.

Front

How do you find the value corresponding to a specific percentile in a normal distribution?

Back

Use the mean and standard deviation along with a z-score table or calculator.

Front

What is the z-score formula?

Back

z = (X - μ) / σ, where X is the value, μ is the mean, and σ is the standard deviation.

Front

What does a z-score indicate?

Back

A z-score indicates how many standard deviations a data point is from the mean.

Front

What is the significance of the 5% fastest students in a study?

Back

It refers to the top 5% of students who study the least amount of time, indicating a cutoff point.