Answer to Question #202370 in Statistics and Probability for Mary

Question

find the point estimate of the population parameter μ, and the standard deviation of the given set of data below.

Percentage of children who watch TV before bedtime.

70 67 58 60 69 62 70 62

69 59 77 59 52 79 59 59

80 42 60 59 68 40 68 68

56 66 60 40 57 57 70 71

72 54 52 67 62 59 71 72

81 49 45 78 78 69 68 69

Answer 1

$\mu=\frac{\sum x_i}{n}=\frac{3039}{48}=63.3$

$\sigma=\sqrt{\frac{\sum(x_i-\mu)^2}{n}}=10.05$