Basic Statistics
GRAPHS 45 Figure 4.4 Histogram with small class intervals. Frequency polygons can be made using options in computer programs. If ...
46 FREQUENCY TABLES AND THEIR GRAPHS Figure 4.5 Distribution curves. to the right, and is common in biomedical and other data; ( ...
PROBLEMS 47 PROBLEMS 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 Make a stem and leaf graph of the first five rows of the blood choleste ...
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CHAPTER 5 MEASURES OF LOCATION AND VARIABILITY In this chapter we present the commonly used numbers that help describe a populat ...
50 MEASURES OF LOCATION AND VARIABILITY 5.1 MEASURES OF LOCATION The number most often used to describe the center of a distribu ...
MEASURES OF LOCATION 51 mean weight is 6 oz, then the total weight is 18 oz, a simple direct calculation. Other measures of loca ...
52 MEASURES OF LOCATION AND VARIABILITY large values there are, the median can be obtained since it is dependent on only the num ...
MEASURES OFVARIABILITY 53 of observations. The reason for dividing by n - 1 instead of n is given in Section 5.3, but for now it ...
54 MEASURES OF LOCATION AND VARIABILITY It should also be noted that knowing the mean and standard deviation does not tell us ev ...
SAMPLING PROPERTIES OFTHE MEAN AND VARIANCE 55 the distribution into four equal parts, with 25% of the distribution in each part ...
56 MEASURES OF LOCATION AND VARIABILITY Table 5.1 Sampling Properties of Means and Variances 22 2,lO 2,8 10,2 10,lO 10,4 10,8 42 ...
CONSIDERATIONS IN SELECTING APPROPRIATE STATISTICS 57 Since the mean of all the fi;’s is equal to p, the sample mean x is called ...
58 MEASURES OF LOCATION AND VARIABILITY 5.4.2 How clean is the data set? If the data set is likely to include outliers that are ...
CONSIDERATIONS IN SELECTING APPROPRIATE STATISTICS 59 Table 5.2 Recommended Graphs and Statistics According to the Stevens Syste ...
60 MEASURES OF LOCATION AND VARIABILITY Figure 5.1 Box plot of hemoglobin levels of high-altitude mine workers. Note that contin ...
PROBLEMS 61 largest X, whichever is lower. The lower fence is at (Q1 - 1.5(IQR)) or the smallest X, whichever is higher. Values ...
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 ...
CHAPTER 6 THE NORMAL DISTRIBUTION The statement that “men’s heights are normally distributed” is meaningful to many who have nev ...
64 THE NORMAL DISTRIBUTION of the normal distribution. The major reasons why the normal distribution is used are given in Sectio ...
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