LOG PROBLEM
What is the mean and the mode of the following numbers?
A) 11.2, 4.42, 11.2, 13.378
Answer: Mean - 10.05 Mode - 11.2
HOMEWORK
What is the mean and the mode of the following numbers?
A) 12.5, 3.12, 3.12, 10
A) 5, 1.42, 10, 10, 10
A) 9.8, 7, 31
Page 3
3a.
2b and 2c are easy because they occur so early in the list.
3b.
2d was difficult because the example was so far down the list.
4.
They probably counted the cases where the sons were taller than their fathers. They could have also graphed their data or found the mean of the sons and the fathers.
Page 4
5a.
Anita’s reasoning is better. She counts the amount of cases. Dustin only uses one value.
5b.
Anita’s reasoning is better. Tiwanda’s numbers can be misleading if there were several very tall sons.
5c.
Huong’s is the best because it takes all the data into account.
Page 6
8.
They collected data from a large sample. If chosen carefully, with attention to representatives, a large sample can show things about the whole population even though the whole population may be much larger than the sample.
Page 7
9.
The fishbowl on the left is representative. It shows every different type of fish. The one on the right does not.
10.
Population- 711; Sample that is not representative – 4 girls
11.
Possibly not, college students in 1903 might have had better nutrition.
Page 8
13.
If a sample does not represent the population fairly, the data will not give a true picture of the population.
14.
It is difficult to see patterns or trends. The data must be organized in some way to make sense of it!
15.
Put the data in order. Graph the data. Calculate the mean and range to summarize the data.
