Alg 2 Unit 8 Lesson 5: Normal Distribution

Alg 2 Unit 8 Lesson 5: Normal Distribution

Let's meet a new math concept and hit it off immediately!!!

Multiple Choice

A normally distributed data set has a mean of 0 and a standard deviation of .5. Which is closest to the percent of values between -1 and 1?

• 34%

• 50%

• 68%

• 95%

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Multiple Choice

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%

Multiple Choice

How should we identify the area under the curve in the following figure?

• From the mean to 2 standard deviations to the right.

• From 3 standard deviations to the left of the mean to 3 standard deviations to the right of the mean.

• From the mean to 2 standard deviations to the left.

• From 2 standard deviations to the left of the mean to 2 standard deviations to the right of the mean.

Multiple Choice

What area under the curve is represented in the figure?

• 95.44%

• 99.72%

• 68.26%

• 100%

Multiple Choice

What area under the curve is represented in the figure?

• 83.99%

• 84.13%

• 50%

• 97.72%

Multiple Choice

A machine is used to put bolts into boxes. It does so such that the actual number of bolts in a box is normally distributed with a mean of 106 and a standard deviation of 2. What is the probability of selecting a box that contains less than 108 bolts?

• 0.84

• 84

• 0.64

• 64

Multiple Choice

2000 freshman at NC State University took a biology test. The scores were distributed normally with a mean of 70 and a standard deviation of 5. What percentage of scores are between 65 and 75?

• 34%

• 50%

• 68%

• 99%

Multiple Choice

500 juniors at Central High School took the ACT last year. The scores were distributed normally with a mean of 24 and standard deviation of 4. Approximately how many juniors scored between 24 and 28?

• 170

• 250

• 340

• 180

Poll

How did you feel about today's lesson? How confident were you about the material?

• Move over teach....I've got this!!

• Good

• A little shaky

• I really need some help