Unit 6, Quiz 1 Review

Unit 6, Quiz 1 Review

Remember a normal curve is a bell shaped curve that is symmetric.

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Multiple Choice

What type of distribution is pictured?

• Right skewed

• Left skewed

• Random

• Normal

Normal Distribution

The mean is always at the center of the normal curve.

Multiple Choice

What is the mean on the graph given?

• 18
• 10

• 0

• 15

Fill in the Blanks

Standard Deviation

The standard deviation on a bell curve is what the x axis is going up and down by.
On the graph given, the standard deviation is 5 because the graph is going up and down by 5.

Multiple Choice

What is the standard deviation on the graph given?

• 2
• 1

• 0

• 5

Left Skewed

Left skewed data sets have extra little bars on the left side.

Multiple Select

Which graphs given are left skewed? Select all that apply.

Right Skewed

Right skewed distributions have extra little bars on the right side.

Multiple Select

Which of the distributions given are right skewed? Select all that apply.

Uniform Distribution

A uniform distribution has bars that are all close to the same height.

Multiple Select

Which of the following distributions are uniform distributions?

The Empirical Rule refers to the percentages in a normal curve.

• ​68% of the data lies within one standard deviation of the mean.

• 95% of the data lies within two standards deviations from the mean.

• 99.7% of the data lies within three standard deviations from the mean.

Empirical Rule

Multiple Choice

What percentages of pregnancies last less than 250 days?

• 2.35%

• 13.5%

• 16%

• 34%

Multiple Choice

What percentage of pregnancies are longer than 298 days?

• 0.15%

• 2.35%

• 2.5%

• 13.5%

Remember your quiz is tomorrow and will cover the first 4 sections of Unit 6.