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Steps in ANOVA
The three steps which constitute the analysis of variance are as follows:
To determine an estimate of the population variance from the variance that exists among the sample means.
To determine an estimate of the population variance from the variance that exists within the samples.
Accept the null hypothesis if the above two estimates are equal or else reject the null hypothesis. If the estimates are equal to or approximately nearer, we get the ratio of the two estimates as either exactly or nearer to 1. This ratio is referred to as F ratio.
The data in the data frame asset are from Myers (1990), \Classical and Modern Regression with Applications (Second Edition)," Duxbury. The response y here is rm return on assets f
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A sample of college students and a separate sample of adults aged 30-59 were surveyed regarding the amount of fruit they eat each day. The results are shown in the histograms belo
Simple Regression: The Teacher Preparation Research Team conducted a study of college students who took the Praxis II-a teacher certification examination. Some variables from
merits and demerits of methods to determin trends
Geometric Mean is defined as the n th root of the product of numbers to be averaged. The geometric mean of numbers X 1 , X 2 , X 3 .....X n is given as
find the expected value of the mean square error and of the mean square reggression
Jocko's Garage has been accused of insurance fraud. Data on estimates made by Jocko and another garage were obtained for 10 damaged vehicles (available in 'jockogarage.txt'). Here
Definition of Central Tendency The central tendency of a variable means a typical value around which other values tend to concentrate which can be measured. Such concentration
Cluster Sampling This method is also known as multi stage sampling .Under this method random selection is made of the ultimate or final units from a given stratum. The sampling
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