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Population pyramid: The diagram designed to show the comparison of the human population by sex and age at a given instant time, consisting of a pair of the histograms, one for every sex, lay on their sides with the same base. The diagram is intended to give a quick overall comparison of age and sex structure of population. The population whose pyramid has a broad base and narrow apex has high fertility rate. Changing shape over time shows the changing composition of the population related with the changes in fertility and mortality at each age. The instance in Figure shows population pyramids for the men and women in Australia in the year 2002.
Unequal probability sampling is the sampling design in which the different sampling units in the population have different probabilities of being included in sample. The differing
Outlier is an observation which seems to deviate markedly from the other members of the sample in which it happens. In the set of systolic blood pressures, {125, 128, 130, 131, 19
Zero-inflated Poisson regression is the model for count data with the excess zeros. It supposes that with probability p the only possible observation is 0 and with the probabilit
Prevalence : The measure of the number of people in a population who have a certain disease at a given point in time. It c an be measured by two methods, as point prevalence and p
You have learned that there are 3 major central measures of any data set. Namely: mean, median, and mode. Which of the three, do the outliers affect the most?
Coefficient of concordance : The coef?cient is taken in use to assess the agreement among m raters ranking n individuals according to some of the speci?c characteristic. Which can
The alternative process to make use of the chi-squared statistic for assessing the independence of the two variables forming a two-by-two contingency table particularly when expect
This is extension of the EM algorithm which typically converges more slowly than EM in terms of the iterations but can be much faster in the whole computer time. The general idea o
Help on my test preparation . .
how to describe association between quantitative and categorical variables
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