Answer to Question #203689 in Statistics and Probability for pooja

Question

A washing machine company chooses a random sample of 10 motors received from one of the suppliers. It determines the length of life of each of the motors. The results (in thousands of hours) are as follows: 4.5, 5.0, 4.2, 4.8, 4.2, 5.1, 4.0, 4.2, 4.2, 4.5

Computer a point estimate of the mean length of life of the motors received from the supplier.

Answer 1

$$\bar{x}=\dfrac{1}{10}(4.5+5.0+4.2+4.8+4.2+5.1+4.0$$

$$+4.2+4.2+4.5)=4.47$$

The point estimate of the mean length of life of the motors received from the supplier is $4470$ hours.