Spring A 2026 MATH.40.HSF2 Statistics: Week 3: Practice Problem
Week 3: Practice Problem
- A random sample of four sales for Windjammer Wines yields the following amounts (rounded off to the nearest dollar).
| $125 | $157 | $209 | $285 |
- Find the arithmetic mean
- Find the median.
- Find the mode.
- Find the range.
- Find the sample standard deviation.
- Find the coefficient of variation.
- A birdwatcher records the type of birds he sees in his garden each week. Last week he saw 4 ravens, 4 finches, 14 hummingbirds, 19 robins, 2 blue jays, and 1 hawk. What is the mode of the data?
- The lengths of human pregnancies are bell-shaped, with a mean of 266 days and standard deviation of 16 days. According to the Empirical Rule, approximately 99.7% of all human pregnancies last between what two values?
- Home prices in a certain county have a mean of $220,258., a median of $205,500., and a standard deviation of $5237. According to Chebyshev’s Rule, at least 88.89%% of the observations will be between what two values?
Tutorial for Practice Problem
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