Math Problem Statement
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) 23.6 36.5 34.3 27.3
Solution
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Math Problem Analysis
Mathematical Concepts
Statistics
Weighted Mean
Standard Deviation
Variance
Formulas
Weighted Mean = Σ(midpoint × frequency) / Σ(frequency)
Variance = Σ((x_i - μ)^2 × f_i) / Σ(f_i)
Standard Deviation = sqrt(Variance)
Theorems
-
Suitable Grade Level
Grades 10-12
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