Which of the Following Statements Is True?
A)Technically, 90 Per $\sigma$

Multiple Choice

Which of the following statements is true?

A) Technically, 90 per cent of the area under a normal distribution lies between +/- 1.65 $\sigma$ from the mean.
B) Technically, 90 per cent of the area under a normal distribution lies between +/- 2.33 $\sigma$ from the mean.
C) Technically, 99 per cent of the area under a normal distribution lies between +/- 1.65 $\sigma$ from the mean.
D) Technically, 99 per cent of the area under a normal distribution lies between +/- 2.33 $\sigma$ from the mean.