Unit 6

The mean age of five people in a room is 30 years old. One of the people, whose age is 50 years old, leaves the room. What is the mean age of the remaining four people in the room?

25

The numbers of calories in 5 sandwiches on a restaurant's menu are shown below. 505, 504, 495, 482, 499 The restaurant plans to add a sixth sandwich to the menu that contains 805 calories. What effect will the new sandwich have on the data set?

The mean will increase by about 51

The number of people attending a safety class and a certification class over several weeks is shown below. Safety Class: {22, 30, 10, 23, 20, 27, 28} Certification Class: {10, 22, 23, 18, 21, 22, 28} Compare the standard deviation of the safety class to the standard deviation of the certification class?

about 1.2 greater

Male Dogs: {6, 12, 15, 25, 46, 75, 10, 82, 103} Female Dogs: {4, 11, 14, 20, 44, 68, 8, 76, 96} Compare the male dogs standard deviation to the female dogs standard deviation.

about 2.5 greater