107_7.1_notes_quiz

The normal distribution follows the ____. A) Central Limit Theorem B) Empirical Rule C) Law of Large Numbers D) None of the above.

• A) Central Limit Theorem

• B) Empirical Rule

• C) Law of Large Numbers

• D) None of the above

What determines the location of the peak in a normal curve?

• Population mean

• Population median

• Population mode

• Population standard deviation

Normal curves extend infinitely far both to the ____.

• Left

• Right

• Both left and right

• Neither

In a normal distribution, approximately what percentage of data falls within one standard deviation of the mean?

• 50%

• 68%

• 95%

• 99.7%

In a normal distribution, approximately what percentage of data falls within two standard deviations of the mean?

• 50%

• 68%

• 95%

• 99.7%

How many measurements are within three standard deviations of the mean?

• 8670

• 8249

• 5404

• 1000

The Empirical Rule demonstrates how areas under the curve represent ________ from the population.

• means

• proportions

• deviations

• scores

When finding an area under the standard normal curve, we use the letter z to indicate a value on the horizontal axis beneath the curve. This value is known as a ________.

• mean

• standard deviation

• z-score

• proportion

The area under a normal curve can be interpreted as a ________.

• mean

• probability

• deviation

• score

Find the area between z = -1.45 and z = 0.42.

• 0.5893

• 0.0735

• 0.6628

• 0.5000