To find the mean life expectancy of the given cities, we will add all the life expectancies together and divide by the number of cities.
1. Add the life expectancies:
\[ 76.7 + 76.7 + 80.7 + 90.2 + 80.7 + 78.9 + 80.7 \]
2. Calculate the sum:
\[ 76.7 + 76.7 + 80.7 + 90.2 + 80.7 + 78.9 + 80.7 = 564.6 \]
3. Count the number of cities:
There are 7 cities.
4. Divide the sum by the number of cities to find the mean:
\[ \frac{564.6}{7} = 80.657 \quad \text{(rounded to three decimal places)}\]
The mean life expectancy is approximately \( 80.657 \) years.
So, the correct choice is:
\[ \text{The mean is approximately } 80.657 \text{ years}. \]
The cities with the highest life expectancy are Nowhereville: 76.7 years; Somewhereopolis: 76.7 years; Kinch City: 80.7 years; Tortuga: 90.2 years; Euler Town: 80.7 years; Godelville: 78.9 years; Sirap: 80.7 years. Find the mean, the median, and the mode.
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Part 1
Find the mean. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
1 answer