Z-scores and the Empirical Rule Worksheet with Answer Key

What's on the worksheet

1. Find the z-score z or the value x, as each part asks.
   z when x = 74,\ \mu = 60,\ \sigma = 8x when z = -1.4,\ \mu = 80,\ \sigma = 5z when x = 6.7,\ \bar{x} = 4.7,\ s = 0.8x when z = 2.6,\ \mu = 6.2,\ \sigma = 0.5z when x = 0.88,\ \mu = 1,\ \sigma = 0.06
2. Priya and Diego sat the same chemistry and history tests as the rest of their class.
3. A public library counted its visitors on a sample of days.
4. A sheep farm weighs every lamb at birth.
5. A pizza shop times its deliveries, from the order to the door.
6. Leah's class flew paper airplanes.