Normal Distribution Quiz

What is another name for the Normal Distribution?

• Exponential Distribution

• Uniform Distribution

• Bell Curve

• Poisson Distribution

What percentage of data falls within one standard deviation of the mean in a Normal Distribution?

• 95%

• 99.7%

• 68%

• 50%

What does skewness measure in a distribution?

• Peak of the distribution

• Outliers

• Symmetry

• Tails of the distribution

What is the kurtosis value for a mesokurtic distribution?

• 3

• 0

• -3

• 1

What does standardizing data help with in statistical analysis?

• Creating outliers

• Comparing observations relative to the mean

• Decreasing kurtosis

• Increasing skewness

What is the total area under the Normal Distribution curve?

• 2

• 1

• 0.5

• 0.25

What does a positive skewness value indicate in a distribution?

• Data are skewed left

• Data have heavy tails

• Data are skewed right

• Data are symmetric

What percentage of data falls within two standard deviations of the mean in a Normal Distribution?

• 68%

• 95%

• 99.7%

• 50%

What is the standard score (z-score) for a value of 65 in a Normal Distribution with mean 38.8 and standard deviation 11.4?

• -0.51

• +1.36

• -1.12

• +2.30

What is the interpretation of a kurtosis value of 0 in a distribution?

• Mesokurtic

• Leptokurtic

• Platykurtic

• Skewed left