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 a standard deviation for age Age Number millions 25 34 23 8 44 7 Type an integer or decimal rounded to two decimal places as needed 6 Type an integer or decimal rounded to two decimal places as needed 35 44 30 6 45 54 30 9 55 64 25 2 C Sa