Question

the state test scores for 12 randomly selected high school seniors are shown on the right. complete parts (a) through (c) below. assume the population is normally distributed. (a) find the sample mean. \\( \overline { x } = \square \\) (round to one decimal place as needed.)

Explanation:

Step1: Sum all the scores

$$1427 + 1228+987+699+725+830+726+748+544+627+1441+950 = 11932$$

Step2: Divide the sum by the number of samples

The number of samples \(n = 12\). The sample mean \(\bar{x}=\frac{11932}{12}\approx994.3\)

Answer:

\(994.3\)