Statistics 1-sample Z tests

confidence interval steps

identify pop and parameter, identify interval and check conditions, write formula, interpret

condition 1

The data are a random sample from the pop. of interest or come from a randomized experiment.

condition 2

The population is at least 10 times the sample size.

condition 3

Normality

confidence interval formula

Z-star(sigma/radical n) is less than or equal to m

significance test steps

write null and alternate hypotheses, state test used, conditions, find p-value, reject or not

type ii error probability steps

inequality for x bar, use surrounding numbers to find z-scores, find