At a computer manufacturing company,the actual size of a computer chip is normally distributed with a mean of 1 centimeter and a standard deviation of 0.1 centimeter.A random sample of 12 computer chips is taken.What is the standard error for the sample mean?
A)0.029
B)0.050
C)0.091
D)0.120

Question

Quizplus · Accepted Answer

The standard error of the sample mean is calculated using the formula: SE = σ / √n, where σ is the population standard deviation and n is the sample size. Here, σ = 0.1 cm and n = 12. Thus, SE = 0.1 / √12 ≈ 0.029.

At a Computer Manufacturing Company,the Actual Size of a Computer