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Essential concepts in Statistics
Exercises
1. The following characteristics were noted for herpes patients in a therapy study:
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Variable |
Type |
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nominal |
ordinal |
metric discrete |
metric continuous |
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Age |
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Gender |
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No. of days since start of disease |
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Sensation of pain (no, mild, medium , strong) |
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No. of vesicles |
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Creatinine level |
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Indicate the correct level of measurement for the 6 characteristics.
2. The age of 7 patients in years: 27, 39, 40, 33, 30, 28, 34
a) Calculate the following statistical estimates: mean, median, range, standard deviation.
b) How does the median of these seven values change if the oldest patient is not 40, but 47 years old?
c) Draw the empirical distribution function.
