Biostatistics — Flashcards

For small samples, to calculate significance of difference between means, t-test is applied, → To compare paired data i.e. independent observations from one sample only, _____ is used t-value is given by, \(t=\) _____

For applying Z-test, \(Z = \) _____ Now to test significance, _____ or, \(Z=\) _____, where s = _____ If _____ at given level of significance, then the observed difference is said to be statistically _____ (_____ is rejected in favor of _____)

_____ is the most robust measure of central tendancy

1st census was conducted in _____

variance=

Formula for Mean for grouped data using the assumed mean method, where, → \(Xg = Mid-point \ of \ each \ groups \ is \ taken \) and, any convenient group may be taken as working mean (\(w\)) → \(f = frequency \ of \ each \ group\) → Working units are denoted as, _____ where, \(i = Group \ interval\) → Then, Grouped weight is derived by \(f \times X \) Now, Mean in Working units is, _____ Real Mean is given by, _____

major determinant of age dependancy ratio is _____

false negative error rate is related to _____ error

_____ plot

formula for FPER(False positive error rate)