Question

Suppose the scores of students on an exam are normally distributed with a mean of 208 and a standard deviation of38. According to the empirical rule, what percentage of students scored between 170 and 246 on the exam?Answer:%

Answer 1

We going to use the normal distribution graph

First we got a mean of 208 and a standard deviation of 38

Now

In the middle of the graph, we have the mean, then every section is added/subtracts an std to the mean. In our case with one std we get the values that we are looking.

Answer: The percentage of students scored between 170 and 246 on the exam is 68%.