Useful tips for everyday
How do you assess treatment effectiveness? The usual approach to measuring treatment outcomes is to construct lengthy questionnaires based on topics that clinicians or researchers…
What is the meaning of absolute risk? Listen to pronunciation. (AB-soh-loot risk) A measure of the risk of a certain event happening. In cancer research,…
Can F-test be used for non-normal distribution? When testing the two samples for equal variance (f-test) it passes both the f-test statistic/p-value and the Levene’s…
How do we use within and between-groups variability? Using ANOVA, we compare the ratio of between-groups variability to within-groups variability. If this ratio is large,…
Who gave hierarchical classification? Carl Linnaeus The taxonomic classification system (also called the Linnaean system after its inventor, Carl Linnaeus, a Swedish botanist, zoologist, and…
How do you find the correlation between z-scores? Find the product of the z-scores by multiplying each of the pairs of z-scores (zxzy). Then sum…
What is finite correction factor? The finite population correction (fpc) factor is used to adjust a variance estimate for an estimated mean or total, so…
Do you have to specify to your that the variables are categorical? From your comments, it appears that you have not specified to R that…
What is the minimum number of samples needed for a reliable average? The minimum sample size is 100 Most statisticians agree that the minimum sample…
How do you convert one unit to another unit? Summary Write the conversion as a fraction (that equals one) Multiply it out (leaving all units…