Intro to normal distribution

What shape is a normal distribution curve?

• Half curve
• Round curve
• Bell curve
• Square curve

The normal curve is symmetrical about the mean.

• True
• False

35 is

• mean

• variance

• standard deviation

• 1st quartile

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

• 100
• 25
• .5
• 1

According to the empirical rule, what percentage of data falls within 1 standard deviation? (HINT: Check your classwork!!)

• 25%

• 68%

• 95%

• 99.7%

Is the data normally distributed? Why or why not? Explain in at least 2 complete sentences with at least 2 reasons to support your answer.

Consider the histogram shown. Does the data appear to be normally distributed? Why or why not? Explain in at least 2 complete sentences with at least 2 reasons to support your answer.

What is the mean of the data set?

What does the mean represent in the context of the scenario? (HINT: Read the title and axis labels!)