1. ## standard deviation

I am very,very bad at these questions I don't know why haha

The scores for a particular examination are normally distributed with a mean of 54.8 percent. the standard deviation is 16.3%. what is the probability of a student getting a mark of 75% or more

2. Originally Posted by dan123
I am very,very bad at these questions I don't know why haha

The scores for a particular examination are normally distributed with a mean of 54.8 percent. the standard deviation is 16.3%. what is the probability of a student getting a mark of 75% or more
Hi dan,

Check the probability of the following in the table, You should be able to get the answer:

$P(Z> \frac{75-54.8}{16.3})$