Hi how are you today i have some questions that i don’t understand from alef website can you give me explanation

57 to 66

Step-by-step explanation:

A standard deviation is the average difference away from the mean that each value is, so the first thing we must do is find the mean of these values

This can be done by adding up all of the scored and dividing that value by the total number of scores. It would look like this

Next to find the values within one standard deviation of the mean, we can add and subtract the standard deviation value from the mean.

So it would look like this

This means that the range is 57 to 66

the final price would be 29.6925

step-by-step explanation:

39.59 minus 25% equals 29.6925