Normal Distribution Practice

What is the standard deviation on this Normal Curve?

• 6

• 12

• 34

• 18

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CCSS.HSS.ID.A.4

What is the value of the mean on this Normal Curve?

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CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

The mean GPA of students in a course at UGA is 3.2 with a standard deviation of 0.3. What percent of students in the course have a GPA between 2.9 and 3.8?

• 81.5%

• 47.5%

• 68%

• 95%

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CCSS.HSS.ID.A.4

The ages of the population of people living in the Atlanta area are normally distributed with a mean of 43 and a standard deviation of 14.

The town has a population of 5,000. How many would you expect to be aged between 29 and 57?

This Standard Normal Distribution curve may help you solve this problem.

• 1750

• 3860

• 3400

• 4330

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CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.

About what percent of the products last between 12 and 15 days?

• 68%
• 34%
• 16%
• 2.5%

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CCSS.HSS.ID.A.4

A company installs 5000 lightbulbs, each with an average life of 500 hours, a standard deviation of 100 hours, and a distribution that is approximately normal.

How many lightbulbs can be expected to last between 400 and 700 hours?

• 4075 lightbulbs

• 4750 lightbulbs

• 1700 lightbulbs

• 3400 lightbulbs

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CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

​ The monthly income of 5000 workers at the Microsoft plant are distributed normally. Suppose the mean monthly income is $1250 and the standard deviation is $250.

Creating a normal distribution curve shows that the amount of workers who earn more than $1500 per month is ​ (a)  

• 800 workers
• 125 workers
• 81.5% of workers
• 97.5% of workers

Tags

CCSS.HSS.ID.A.4

​ The monthly income of 5000 workers at the Microsoft plant are distributed normally. Suppose the mean monthly income is $1250 and the standard deviation is $250.

Creating a normal distribution curve shows that the amount of workers who earn less than $750 per month is ​ (a)  

• 800 workers
• 125 workers
• 81.5% of workers
• 97.5% of workers

Tags

CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.1

​ The monthly income of 5000 workers at the Microsoft plant are distributed normally. Suppose the mean monthly income is $1250 and the standard deviation is $250.

Creating a normal distribution curve shows that the percentage of workers who earn between $750 and $1500 per month is ​ (a)  

• 800 workers
• 125 workers
• 81.5% of workers
• 97.5% of workers

Tags

CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.1

​ The monthly income of 5000 workers at the Microsoft plant are distributed normally. Suppose the mean monthly income is $1250 and the standard deviation is $250.

Creating a normal distribution curve shows that the percentage of workers who earn less than $1750 per month is ​ (a)  

• 800 workers
• 125 workers
• 81.5% of workers
• 97.5% of workers

Tags

CCSS.HSS.ID.A.4