1 for the data of exercise 44 calculate the vari- ance, Ask an Expert

Statistics

1. For the data of Exercise 4.4, calculate the vari- ance using the formula

(a) of form (4.2.1);

(b) in Theorem 4.1.

2. The tar contents of 8 brands of cigarettes selected at random from the latest list released by the Federal Trade Commission are as follows: 7.3, 8.6, 10.4, 16.1, 12.2, 15.1, 14.5, and 9.3 milligrams. Calculate

(a) the mean;

(b) the variance.

3. 3.2 1.9 2.7 2.4 2.8 2.9 3.8 3.0 2.5 3.3 1.8 2.5 3.7 2.8 2.0 3.2 2.3 2.1 2.5 1.9 The grade-point averages of 20 college seniors se- lected at random from a graduating class are as follows:

For the given phosphate data, ?nd

(a) the mean;

(b) the median;

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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