Using what we know about the Standard Normal (z) distribution and the fact that the distribution of hours per week worked for pay (from Qs above) is Normally distributed, what percentage of the students are within 6.74 hours of the mean number of hours worked for pay in a typical week? Report the answer and also explain how you came to that answer.

(HINT: you can use the z-table for this, but shouldn't need to if you know what makes the Standard Normal distribution unique and the "rule" about what it tells us about distributions.)