The following data represent the number of people aged 25 to 64 years covered by health insurance​ (private or​ government) in 2018. Approximate the mean and standard deviation for age.
Age
​25-34
​35-44
​45-54
​55-64

Number​ (millions)
28.8
34.6
32.8
22.6
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Part 1

​(Type an integer or decimal rounded to two decimal places as​ needed.)
Part 2

​(Type an integer or decimal rounded to two decimal places as​ needed.)