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Task 1-The weight of several cell phones, and their battery life (in
hours) were measured. The data for this is below:
w is how many ounces a cell phone weighed
b is how many hours of talk time it had
w b
3.8 80
4.8 90
6.1 140
7.5 160
8.8 200
What is the average weight (the mean weight) of this group of cellphones?
How much do these phones weigh together?
Make a pie chart of the different weights of the cell phones. What percentage
of the total weight is the heaviest phone?
Plot the battery life against weight on a graph. (Hint: the y-axis should
represent battery life, and the x-axis should represent weight)
Find the line of best fit for b vs. w and plot it
Task 2 -Below are lists of data describing the amount of milk some cows
produced. The first list is the cows' milk production a few months ago,
before the farmer changed the cows' feed. The second list was taken recently,
and shows how much milk the cows are producing with the new feed.
before: 39, 42, 43, 44, 39, 40, 42, 51, 40, 47
after: 52, 53, 50, 46, 39, 49, 50, 49, 51, 44
Remove any plots left over from previous tasks
Use box-and-whisker plots to compare the milk production before and after
the new feed. (Hint: create one box-and-whisker plot for "before",
and create another for "after")
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