Basic Statistics
PROBLEMS 25 privacy reasons. A list is made of 10-15 nearby houses following an agreed-upon pattern. The interviewer visits the ...
26 POPULATIONS AND SAMPLES 2.7 2.8 freshmen, sophmores, juniors, and seniors since it is thought that the attitudes might change ...
CHAPTER 3 COLLECTING AND ENTERING DATA Regardless of what type of medical or public health study is performed, the resulting dat ...
28 COLLECTING AND ENTERING DATA to be made on a variety of topics, such as who will be eligible for the study, what information ...
INITIAL STEPS 29 The cost of the new equipment for taking the measurements and recording the data needs to be investigated. 3.1. ...
30 COLLECTING AND ENTERING DATA correct addresses are needed, response rates tend to be low, and problems of literacy and langua ...
DATAENTRY 31 so that they can determine what data actually is available on the medical records and if it is recorded in a consis ...
32 COLLECTING AND ENTERING DATA group identity. In this example, one might want to compare the results for males and females, so ...
CODEBOOK 33 If the investigator already has a printed copy of the data in a spreadsheet format, the data can be scanned so that ...
34 COLLECTING AND ENTERING DATA and how the information has been entered into the statistical package. A code book for the data ...
CHAPTER 4 FREQUENCY TABLES AND THEIR GRAPHS Usually, we can obtain only a rather vague impression from looking at a set of data, ...
36 FREQUENCY TABLES ANDTHEIR GRAPHS Table 4.1 Hemoglobin Levels of 90 High-Altitude Mine Workers (g/cm3) 18.5 16.8 23.2 19.4 19. ...
NUMERICAL METHODS OF ORGANIZING DATA 37 Table 4.2 Workers (g/cm3) Ordered Array of Hemoglobin Levels of 90 High-Altitude Mine 12 ...
38 FREQUENCY TABLES AND THEIR GRAPHS make, especially if one starts with an ordered array such as that given in Table 4.2. Stati ...
NUMERICAL METHODS OF ORGANIZING DATA 39 Table 4.4 Mine Workers (g/cm3) Frequency Table for Hemoglobin Levels of 90 High-Altitude ...
40 FREQUENCY TABLES AND THEIR GRAPHS Table 4.5 Workers Illustrating Relative Frequency and Cumulative Frequency Hemoglobin Level ...
GRAPHS 41 showing the main features. In making a graph, we draw a picture of the situation, and we may lose even more of the fin ...
42 FREQUENCY TABLES AND THEIR GRAPHS Figure 4.1 workers. (b) High-altitude mine workers. Distributions of hemoglobin levels of m ...
GRAPHS 43 Table 4.6 Frequency Table of Ages of 302 Deaths from Scarlet Fevera Age (years) Number of Deaths Relative Frequency 0- ...
44 FREQUENCY TABLES ANDTHEIR GRAPHS 703 Age (years) Figure 4.3 Age of 302 deaths from scarlet fever: a frequency polygon seem to ...
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