Scelta multipla
Which of the following are commonly used measures of center for a data set?
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3. Describing Data Numerically
Mean
Scelta multipla
Suppose the heights (in centimeters) of five students are , , , , and . What is the mean height of these students?
A
centimeters
B
centimeters
C
centimeters
D
centimeters
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Identify the data set: the heights of the five students are 150 cm, 160 cm, 170 cm, 180 cm, and 190 cm.
Recall the formula for the mean (average) of a data set: \(\text{Mean} = \frac{\text{Sum of all data points}}{\text{Number of data points}}\).
Calculate the sum of the heights: add 150, 160, 170, 180, and 190 together.
Count the number of data points, which in this case is 5 students.
Divide the sum of the heights by the number of students using the formula: \(\text{Mean} = \frac{150 + 160 + 170 + 180 + 190}{5}\).
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