MATHEMATICS

Question 11 (20 points)

Question 11 Unsaved

Question 11 options:

The Contingency table cross classifies institutions of higher education in the United States by region and type, public or private.

Public Private Sub total
Northeast     6     14   20
Mideast     4     12   16
South   15       9   24
West   15     25   40
Sub total   40     60   100

Enter all answer as a fraction (not reduced) or a decimal rounded to 2 decimal places with no 0 to the left of the decimal point.

Do not enter an answer as a percent.

Suppose an institution of higher education is selected at random.

Determine the probability the institution obtained is:

Located in the West?

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Located in the Mideast and is a Public Institution?

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Located in the West or is a Private Institution?

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A Public Institution given the Institution is located in the Northeast?

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Located in the Mideast and the Northeast?

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Question 12 (20 points)

Question 12 Unsaved

Question 12 options:

A shipment of TVs contains units that are 70% top quality.  Thirty percent (30%) of the TVs are poor quality.

Two TVs are randomly selected from the shipment and tested.

What is the probability that both TVs selected are top quality?

Enter answer as a decimal rounded to 2 decimal places.

Do not include the 0 to the left of the decimal point.

Do not enter answer as a percent.

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What is the probability that one of or more of the TVs are top quality?

Enter answer as a decimal rounded to 2 decimal places.

Do not include the 0 to the left of the decimal point.

Do not enter answer as a percent.

Spell check

Question 13 (20 points)

Question 13 Unsaved

Question 13 options:

The length of western rattlesnakes are normally distributed with a mean of 60 inches and a standard deviation of 4 inches.

Normal Distribution Calculator http://onlinestatbook.com/2/calculators/normal.html

Enter all probability answers as a decimal rounded to 4 decimal places.

Do not include a 0 to the left of the decimal point.

Do not enter an answer as a percent.

Suppose a rattlesnake is found on a mountain trail:

What is the probability that the rattlesnakes’ length will be equal to or less than 54.2 inches?

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What is the probability that the rattlesnakes’ length will be between 54.2 inches and 65.8 inches?

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What length must a rattlesnake be to be in the top 10% of it’s species?

Enter this answer as a length rounded to 1 decimal place.

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Suppose a nest of 16 rattlesnakes are found on the mountain trail:

What is the probability that the average length of the rattlesnakes will be 60.85 inches or less?

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