At a computer manufacturing company, the actual size of computer ...

[OSWALD]

At a computer manufacturing company, the actual size of computer chips 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. Above what value do 2.5 of the sample means fall?
 
  What will be an ideal response?

Question 2

If a particular set of data is approximately normally distributed, we would find that approximately
 
  A) 4 of every 5 observations would fall between 1.28 standard deviations around the mean.
  B) 19 of every 20 observations would fall between 2 standard deviations around the mean.
  C) 2 of every 3 observations would fall between 1 standard deviation around the mean.
  D) All of the above.

[jointhecircus]

Answer to Question 1

1.057

Answer to Question 2

D