Summary statistics from histograms

12 questions

1. A __________ is a diagram consisting of rectangles whose area is proportional to the frequency in each class and whose width is equal to the class interval.
2. Here are the times taken to type the alphabet. Which of the following has a frequency density of 1.6?
3. Here is some data on the lengths of some parcels. Which of the following have a frequency more than 13?
4. Here is a histogram showing lengths of different fruit. x, y and z are what values?
5. Here are the times taken to type the alphabet. Which of the following has a frequency greater than 10?
6. Here is a histogram showing the time it takes to solve a puzzle. What is the total frequency?
7. The (arithmetic) __________ for a set of numerical data is the sum of the values divided by the number of values. It is a measure of central tendency representing the average of the values.
8. Histograms are excellent visual aids to show the distribution of data, but using the estimate mean from a histogram has more benefits. Select the appropriate reason.
9. Here are some times it takes for Oak class A to type the alphabet. Using the table, work out the estimate mean. There is no need to include the units.
10. Here are some times it takes for Oak class B to type the alphabet. Using the table, work out the estimate mean. There is no need to include the units.
11. The estimate mean for Oak class A was 16.85 seconds and the estimate mean for Oak class B was 13.75 seconds. What does this mean?
12. Work out the estimate median using this histogram showing lengths of pieces of wood. There is no need to include the units.

License: OGL