WebChi-Square Test for the Variance. A chi-square test ( Snedecor and Cochran, 1983) can be used to test if the variance of a population is equal to a specified value. This test can be either a two-sided test or a one-sided test. The two-sided version tests against the alternative that the true variance is either less than or greater than the ... WebEveryone who is pregnant should be tested for syphilis, HIV, hepatitis B, and hepatitis C starting early in pregnancy. Those at risk for infection should also be tested for chlamydia and gonorrhea starting early in pregnancy. …
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