1. A coffee company named Dingolfica packs 434 packs of coffee in bags marked as 250g. A large number of packs of coffee were weighed and the mean and standard deviation were calculated as 255 g and 2.5 g respectively. Assuming this data is normally distributed, what percentage of packs are underweight?

2. The heights of students in Alexander College are Normally distributed with mean 1.5 m and standard deviation 0.3 m. In a population of 400 students, how many would you expect to have a height between 1.4 m and 1.6 m?

3. For a Normal distribution N(21,3), find Q1, Median and Q3.

4. The ages of Canadian chess players are normally distributed, with a mean of 38 and a standard deviation of 4. What percent of golfers are between 30 and 46 years old?

5. Explain in words what is the use of a density curve. Why is it not possible to continue with Histograms, instead of a density curve?