Basic Statistics

62 MEASURES OF LOCATION AND VARIABILITY

5.3

5.4

5.5

(e) Which observations might you check to see if they were outliers?

Compute the mean and standard deviation from Table 4.5 for the low-altitude

miners.

For a population consisting of the numbers 1, 2, 3, 4, and 5, if all possible

samples of size 4 were obtained, without performing calculations from the

samples, what should the mean of all the sample means equal? What should

the mean of the sample variances equal?

The following table contains values of body mass index (BMI) for 25 patients.

Obtain the mean and standard deviation. Use a histogram and box plot to

display the results.

29 22 23 31 33

20 17 34 25 33

25 27 28 24 28

36 31 21 29 18

26 26 44 25 36

REFERENCES

Afifi, A., Clark, V. A. and May, S. [2004]. Computer-Aided Multivariate Analysis, 4th ed.,

Dixon, W. J. and Massey, F. J. [1983]. Introduction to Statistical Analysis, 4th ed., New York:

Hoaglin, D. C., Mosteller, F. and Tukey, J. W. [1983]. Understanding Robust and Exploratory

Kalton, G. [1983]. Introduction to Survey Sampling, Newbury Park, CA: Sage, 13.

Tukey, J. W. [ 19771. Exploratory Data Analysis, Reading, MA: Addison-Wesley, 39-41.

Weisberg, H. F. [1992]. Central Tendency and Variabiliw, Newbury Park, CA: Sage,

Boca Raton, FL: Chapman & Hall/CRC: 72-75.

McGraw-Hill, 534.

Data Analysis, New York: Wiley, 35-36, 283-345.

22-34.