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The following is a frequency distribution of ages of residents of a senior citizens' home in New York. Fill in the midpoints, then calculate the

The following is a frequency distribution of ages of residents of a senior citizens' home in New York. Fill in the midpoints, then calculate the mean and the standard deviation. Round to two decimal positions. You may assume the data represents a population.

Ages of Residents Midpoints Frequency

606760-67

17

687568-75

24

768376-83

8

849184-91

4

  1. Mean =
  2. Standard deviation =

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