Statistics

3.     It is the average of a data set.

• A. MEAN

• B. MEDIAN

• C. MODE

• D. RANGE

4.     Population mean is denoted by what symbol?

• B. s

• 

5.     It is defined as the specific group that you will collect data from.

• A. POPULATION

• B. SAMPLE

• C. MEAN

• D. STATISTIC

Find the median of the data set
9, 8, 7, 11, 7, 16, 3

• 8
• 7
• 3
• 2

Find the standard deviation of the following

2, 5, 5, 8, 11, 12

to 3 s.f.

Find the standard deviation of the following

2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2

What percentage of data is within 2 standard deviations

• 68

• 95

• 99.7

• 2.35

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%

1.  Which best describes the shaded part of this normal distribution graph?  

• All data that is one or higher.
• All data that is one or more standard deviations above the mean.
• All data that is between 1 and 3.
• All data that is above the mean.

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

• 68%
• 95%
• 99.7%
• 50%