zoinnk wrote:

vivektripathi wrote:

A certain characteristic in a large population has a distribution that is symmetric about the

mean m. If 68 percent of the distribution lies within one standard deviation d of the mean,

what percent of the distribution is less than m +d ?

A. 16%

B. 32%

C. 48%

D. 84%

E. 92%

D

The prompt says that 68% of the population lies between m-d and m+d.

Thus, 32% of the population is less than m-d or greater than m+d.

Since the population is symmetric, half of this 32% is less than m-d and half is greater than m+d.

Thus, (68+16)% or (100-16)% of the population is less than m+d.

Hi Team,

i think i cannot understand the language of these type of questions.

i have the problem of understanding the question language only in standard deviation and mean questions.

if anyone has like 5-10 ques for practice of this sort of questions then please post here for me. Thanks in advance!

Query : in this particular question how does the line " If 68 percent of the distribution lies within one standard deviation d of the mean" means that "The prompt says that 68% of the population lies between m-d and m+d."

i cant understand even the base of the question here. Please help me out .

Thanks a lot.