If the mean for a group equals 30 and the standard deviation equals 5, what percentage of the cases in a normal distribution lies between 25 and 35?

Question

anonymous · Answer

25th percentile

anonymous · Answer

could you please show me the calculations coz i have a number of sums ! please !

blues · Answer

In the first place, please post math questions in math not biology. People better able to help you will find it there and it will help us keep the site organized, so everyone benefits.

That said, you should use Chebyechev's inequality for a normal distribution: With a normal distribution, approx 68% of the data is within one standard deviation of the mean, 95% is within two and 99.7% is within three standard deviations of the mean.

It gives you the mean and it gives you the standard deviation...