Chapter 2 Introduction Statistics

Calculate the mean of the following data set: 15, 13, 7, 9, 15, 16, 15, 18, 9, 3, 11

• 11.6
• 13.1
• 11.9
• 14.6

The mean height of a 164 cm with a standard deviation of 3 cm. Using the empirical rule, what percent of women fall between 158 cm to 170 cm?

• 68%
• 95%
• 99.7%

What measure of central tendency is best used when the data has an outlier?

• Mean
• Median
• Mode

Find the Q₁, Q₂, and Q₃ of the following data set:
12, 11, 9, 18, 16, 15, 19, 19, 14, 7, 20

• 11; 14; 19
• 9; 15; 19
• 11; 15; 19
• 9; 14; 18

Identify the mode of the following data set: 15, 13, 7, 9, 15, 16, 15, 18, 9, 3, 11

• 9
• 15
• 16
• 9 & 15

Calculate the Weighted Mean:
Topic           Score            Percent
Q1                 77                  40%
Q2                 89                  40%
Final              94                  20%

• 8.52%
• 86.7%
• 85.2%

Calculate the Mean of the Frequency Table:
    Class               Frequency
0-4                           10
5-9                           18
10-14                       11

• 7.1
• 13.2
• 0.14

Find the range of the following data set:
99, 12, 23, 48, 66, 77, 89, 90, 11, 101

• 88
• 89
• 90
• 91

The mean height of a 164 cm with a standard deviation of 3 cm. Using the empirical rule, what percent of women fall between 158 cm to 167 cm?

• 68%
• 81.5
• 95%

Calculate the median of the following data set: 15, 13, 7, 9, 15, 16, 15, 18, 9, 3, 11

• 13
• 14
• 15
• 16