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Lesson 5.6 Normal Distribution Calculations Practice cloned 2/21/2023

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1.

The distribution of speed follows an approximately Normal distribution with a mean of 80 mph and a standard deviation of 7.7 mph.

Use the 'show your work' section to put in the Delorean speeds under the axis for the Normal Distribution Model.

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2.

Give the notation for the Normal model using the Delorean Speed information above.

Use the format: N(mean, std dev)

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3.

Using the 68-95-99.7 Rule & your flip book:

What percent of the runs will give the Delorean a speed greater than 87.7 mph?

THEN shade in the probability area you are calculating in the 'show your work area'.

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4.

Using the 68-95-99.7 Rule & your flip book:

What percent of the runs will give the Delorean a speed between 64.6 mph and 87.7 mph?

THEN Shade in the probability area that you are calculating in the 'show your work' area.

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8.

High levels of cholesterol in the blood increase the risk of heart disease. For teenage boys, the distribution of blood cholesterol is approximately normal with mean μ = 151.6 milligrams of cholesterol per deciliter of blood (mg/dl) and standard deviation σ = 25 mg/dl.

What is the Normal model for this situation?

Use the format: N(mean, std. dev.)

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13.

6th grade STAAR scores were tabulated for Round Rock ISD, the normal model N(1142, 110) was appropriate for the data.

If a student scored 1040 on his STAAR test, what was his z-score?

Round your answer to three places past the decimal.

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14.

6th grade STAAR scores were tabulated for Round Rock ISD, the normal model N(1142, 110) was appropriate for the data.

A student scored 1040 on his STAAR test, you just calculated his z-score.

What does this mean?

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15.

What does the z-score mean?

Suppose that a Normal model described student scores in a history class.

Francisco has a standardized score (z-score) of +2.5.

This means that Francisco’s score...

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17.

The heights of Dutch men have a mean of 184 cm and standard deviation of 8 cm.

The heights of French men have a mean of 174 cm and a standard deviation is 7.1 cm.

A French man is 194 cm tall and a Dutch man is 204 cm tall.

What is the z-score for the French man? (round to two places past the decimal point)

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18.

The heights of Dutch men have a mean of 184 cm and standard deviation of 8 cm.

The heights of French men have a mean of 174 cm and a standard deviation is 7.1 cm.

A French man is 194 cm tall and a Dutch man is 204 cm tall.

What is the z-score for the Dutch man? (round to three places past the decimal point)

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19.

The heights of Dutch men have a mean of 184 cm and standard deviation of 8 cm.

The heights of French men have a mean of 174 cm and a standard deviation is 7.1 cm.

Who is taller compared to males in their country, a French man who is 194 cm tall

or a Dutch man who is 204 cm tall?

How do you know? Explain clearly using what we have discussed in class about z-scores.

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24.

You just found the probability of randomly choosing a Dutch man over 203.8 cm tall.

Using the z-score and the probability, would you say this is an unusual height for a Dutch man?

Explain why or why not. Select both answers.