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Assessment

Stem and Leaf

Part I

Define the following terms:

Stem and leaf

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Part II

Given the following data, create a stem and leaf plot.

For a group of boys, the resting heart rate and the rate after a step exercise is shown.

Find the mean, median and mode of each set of heart rates.

Order	RestHR	StepHR	Order	RestHR	StepHR	Order	RestHR	StepHR
1	87	93	11	84	84	21	69	108
2	87	111	12	90	108	22	90	99
3	81	120	13	78	96	23	93	153
4	75	123	14	84	90	24	72	99
5	81	96	15	90	147	25	69	93
6	84	99	16	60	75	26	69	93
7	84	99	17	96	141	27	87	129
8	90	129	18	63	84	28	78	93
9	75	90	19	69	135	29	72	99
10	78	87	20	87	120	30	78	129

Part III

Find mean, median, and mode for each of the heart rates (resting and after step exercise).

Resting

Mean ________ Median ________ Mode ________

Exercising

Mean ________ Median ________ Mode ________

Which of the three measure of center best describes this data? Explain your choice.

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