The amounts of coffee dispensed from the vending machine fol…

The amounts of coffee dispensed from the vending machine follow a bell-shaped symmetric distribution.  In a sample of 50 cups of coffee dispensed from the vending machine, the mean amount dispensed was 7.6 ounces with a standard deviation of 0.2 ounces. Which of the following is true?

A random sample of 423 students was analyzed.  The number of…

A random sample of 423 students was analyzed.  The number of students achieving basic skill levels in four subjects according to the type of school is presented in the table below. What percent of sampled students from suburbian school achieve basic skill levels in Social Studies?