Question

1. Nonpoint source loads are chemical masses that travel to the main stem of a river in flows that are distributed over relatively long stream reaches. Suppose source loads are known to have a mean value of 73 and a standard deviation of 10. We will take a random sample of 48 loads and calculate the sample mean, X. (a) What is the mean of X

Answer 1

The sample mean of X is 73.

Explanation:

We are given the following information in the question:

Mean, μ = 73

Standard Deviation, σ = 10

Sample size, n = 48

We have to calculate the sample mean of X

Sample mean:

• The best approximator of the sample mean is the population mean itself.

Thus, we can write:

`\mu_(X) = \mu = 73`

Thus, the sample mean of X is 73.