Question: will each of the following increase, decrease, or have no effect on the value of a test statistic for one-sample z test? a) the sample

will each of the following increase, decrease, or have no effect on the value of a test statistic for one-sample z test?

a) the sample size is increased

b) the population variance is decreased

c) the sample variance is doubled

d) the difference between the sample mean and population mean is decreased

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