Answer to Question #255128 in Statistics and Probability for Zah

Question

Glass Houses Pty has found that the cost of fitting new sliding doors is normally distributed, with an average cost per door of R12 750, and a standard deviation of R1 095. A sample of 105 new windows is randomly selected. Assuming normal distribution: Determine the standard error for this sample.

Answer 1

$$SE=\dfrac{\sigma}{\sqrt{n}}=\dfrac{1095}{\sqrt{105}}\approx106.861058$$