Question

Does anyone know how to do his? PLZ help me

Answer 1

1. Do you know the empirical rule for a normal distribution?

Answer 2

Your course should surely cover the empirical rule if you are expected to answer this type of question.

Answer 3

The empirical rule states that for a normal distribution, nearly all of the data will fall within three standard deviations of the mean. The empirical rule can be broken down into three parts:

68% of data falls within the first standard deviation from the mean.
95% fall within two standard deviations.
99.7% fall within three standard deviations.

Answer 4

The following part of the empirical rule applies to your question part 1:
95% of the data points fall within the range plus and minus two standard deviations from the mean.
In part 1, what is the value of two standard deviations?

Answer 5

the first one is E and the seoncd one is D

Answer 6

Yes, you are correct.

Answer 7

Thakn you for your help! :)

Answer 8

You're welcome :)