Create parallel boxplots to display given results

Assignment Help Basic Statistics

Reference no: EM131394291

Caffeine.

A student study of the effects of caffeine asked volunteers to take a memory test 2 hours after drinking soda. Some drank caffeine-free cola, some drank regular cola (with caffeine), and others drank a mixture of the two (getting a half-dose of caffeine). Here are the 5-number summaries for each group's scores (number of items recalled correctly) on the memory test:

	n	Min	Q1	Median	Q3	Max
No Caffeine	15	16	20	21	24	26
Low caffeine	15	16	18	21	24	27
High caffeine	15	12	17	19	22	24

a) Describe the W's for these data.

b) Name the variables and classify each as categorical or quantitative.

c) Create parallel boxplots to display these results as best you can with this information.

d) Write a few sentences comparing the performances of the three groups.

Reference no: EM131394291

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