Use the following information to answer the next three questions.
 the population mean (µ) is hypothesized to be 200
 the sample mean ($ \overline{x}$) is 220
 the sample size (n) is 25
 the unbiased sample standard ($ \hat{s}$) is 15
-The estimated value of the standard error of the mean ($ \frac{s}{x}$) is
A) 0.6.
B) 0.9.
C) 1.6.
D) 2.6.
E) 3.0.

Question

Use the following information to answer the next three questions.
  the population mean (µ) is hypothesized to be 200
  the sample mean ($ \overline{x}$) is 220
  the sample size (n) is 25 
  the unbiased sample standard ($ \hat{s}$) is 15
-The estimated value of the standard error of the mean ($ \frac{s}{x}$) is
A) 0.6.
B) 0.9.
C) 1.6.
D) 2.6.
E) 3.0.

Quizplus · Accepted Answer

The standard error of the mean is calculated as the sample standard deviation divided by the square root of the sample size: $ \frac{15}{\sqrt{25}} = \frac{15}{5} = 3.0 $.

Use the Following Information to Answer the Next Three Questions x‾ \overline{x}x

Use the Following Information to Answer the Next Three Questions $\overline{x}$