Normal Distribution Week 8 Quiz

Identify a feature of Normal distribution

• Bell shaped curve

• Skewed right

• Symmetrical

• 'Tails' of the curve never touch x-axis

The area under a Normal distribution curve is

• 1

• 0

• 100

• .1

Tags

CCSS.7.SP.C.7A

What effect does increasing the standard deviation have on the Normal curve?

• Shifts it to the right

• Shifts it to the left

• Makes the curve flatter

• Makes the curve taller

What effect does increasing the mean have on the normal curve?

• shifts it right

• shifts it left

• makes the curve flatter

• makes the curve taller

In a Normal distribution curve, what percent of data is within 2 standard deviations of mean?

• 34%

• 68%

• 95%

• 99.7%

Tags

CCSS.HSS.ID.A.4

What is a z-score?

• The number that occurs most often

• The average of all the scores

• Where a score lies in relation to the mean

• The difference between the largest score and the smallest

If the z-score for an observation is -1.5, this observation is...

• Below average

• Above average

• An outlier

• Middle value

For a Standard Normal distribution, the mean and standard deviation are:

• 0 and 1

• 1 and 0

• 0.5 and 1

• -1 and 1