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Multiple Choice

What is the total area under the normal curve in a standard normal distribution?

• 1

• 2

• 3

• 4

Multiple Choice

Where can we locate the mean in the normal curve?

• to the left portion

• to the right portion

• at the center

• on the z - axis

Multiple Choice

Which of the following graphs shows a normal curve?

Multiple Choice

This data is normally distributed.  What percent of the data is in the shaded region?

• 68%
• 95%
• 99.7%
• 50%

Multiple Choice

This data is normally distributed.  What percent of the data is in the shaded region?

• 68%
• 95%
• 99.7%
• 50%

Multiple Choice

This data is normally distributed.  What percent of the data is in the shaded region?

• 68%
• 95%
• 99.7%
• 50%

Multiple Choice

This data is normally distributed.  What percent of the data is in the shaded region?

• 68%
• 32%

• 95%
• 50%

Multiple Choice

What is half of the total area of the normal curve?

• -1

• 0

• 0.5

• 1

Multiple Choice

What is the shape of a Normal Probability Distributions?

• bar

• bell

• circle

• line

Multiple Choice

Which part of a normal curve is asymptotic with the horizontal axis?

• center

• curve

• tail

• top

Multiple Choice

Under the curve, the area to the right of the mean is_________.

• 30%

• 47.72%

• 50%

• 68%

Multiple Choice

Which of the following parameters is the basis of the shape of the normal curve?

• mean

• standard deviation

• variance

• both mean and standard deviation

Multiple Choice

Which of the following does NOT belong to the group?

• to the right

• above

• to the left

• greater than

Multiple Choice

How many percents is the total area that corresponds to the right of 0 and to the left of 0?

• 25%

• 50%

• 75%

• 100%

Multiple Select

For a Normal Curve which of the following terms equal the same number?

• Mean

• Median

• Mode

• Range

• Standard Deviation

The Empirical Rule 68%, 95%, 99.7%

• 68% of the data is within 1 SD of the mean above and below.

• 95% of the data is within 2 SD of the mean above and below.

• 99.7% of the data is within 3 SD of the mean above and below.

Multiple Choice

What percent of the data is 3 standard deviation above or below the mean?

• 68%

• 99.7%

• 95%

• 50%

Multiple Choice

What percent of the data is 2 standard deviation above or below the mean?

• 68%

• 99.7%

• 95%

• 50%

Finding Probabilities with the Empirical Rule

• Use the diagram to help! Mean is 80 and the SD is 10

• What percent of the data lies between 70 and 80? (0.34 or 34%)

• What percent of the data lies between 90 and 110? (0.135+0.0235 = 0.1585 or 15.85%)

Multiple Choice

What Percent of the data lies between 70 and 90?

• 68%

• 0.68

• 34%

• 99.7%

Multiple Choice

What Percent of the data lies below 80?

• 50%

• 68%

• 34%

• 99.7%

Multiple Choice

What Percent of the data lies between 60 and 90?

• 50%

• 81.5%

• 68%

• 99.7%

Multiple Choice

What is the percentage of data that falls within two standard deviations of the mean? 

• 68%
• 95%
• 99.7%

Multiple Choice

What is the area under the curve between z = 1 and z = 0 ?

• .68
• .34
• 1
• .8413

Multiple Choice

What shape is a normal distribution curve?

• Half curve
• Round curve
• Bell curve
• Square curve

Multiple Choice

In a normal distribution, the mean, median and mode are

• within 1 standard deviation

• very similar

• within 0.1%

• equal

Multiple Choice

If you had to guess the probability of the gray area, which would you choose?

• 0.2

• 0.4

• 0.6

• 0.8

Multiple Choice

Given a mean of 75 and a standard deviation of 7, what percentage of scores are between 75 and 82?

• 68%

• 81.5%

• 16%

• 34%

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

According to the empirical rule, what percentage of data falls within 1 standard deviation of the mean?

• 25%

• 68%

• 95%

• 99.7%

Multiple Choice

If this is the graph of data normally distributed with a mean of 30 and a standard deviation of 5, what label (number) is written at the blue circle?

• 20

• 15

• 40

• 30

Multiple Choice

The 75th percentile is also know as the

• median
• third quartile
• 1st quartile`
• interquartile range

Multiple Choice

If I tell you that you scored at the 55th percentile on your final exam, you would know:

• 55% of the class scored the same or worse than you did

• You earned a 55% on the exam

• You failed the exam

• 45% of the class scored worse than you did

Multiple Choice

The Median is also referred to as

• the 25th Percentile

• the 50th Percentile

• the 75th Percentile

• the 100th Percentile

Multiple Choice

In order to find the median, the data must be sorted from least to greatest first.

• True
• False

Multiple Choice

A data set can have more than one mode

• True
• False

Multiple Choice

A data set can have more than one median?

• True
• False

Multiple Choice

What is the relative frequency of students speaking Arabic?

• 32%
• 24%
• 10%
• 2%

Multiple Choice

What percentage of SUV's are driven by women?

• 56.25%
• 75%
• 83.25%
• 86.5%

Multiple Choice

What percentage of males drive sports cars?

• 35%
• 16.25%
• 65%
• 25%

Multiple Choice

The frequency of a specific data value divided by the total number of data values in the set.

• Relative Frequency

• Conditional Relative Frequency

• Marginal Relative Frequency

• Joint Relative Frequency