Stat Chapter 1: confidence intervals

if the null hypothesis is inside the confidence interval, then the decision was likely to _______ using hypothesis testing

retain the null hypothesis

what explains why point estimation can be a useful procedure to estimate a population means

the sample mean is equal to the population mean on average and the sample mean is an unbiased estimator of the population mean

what describes the goal of estimation?

to narrow in on the true population mean by defining limits within which it is likely to be contained

why is a point estimate typically reported with an interval

using only a point estimate is associated with low certainty the interval estimate gives researchers a higher level of confidence the interval estimate adds certainty to the estimate of the population mean

a researcher reports with 90% confidence that 31% to 37% of Americans believe in ghosts. what is the true point estimate for this interval?

34%

if the value stated by the null hypothesis is _____ the confidence interval, then the decision would have likely been to retain the null hypothesis

Inside

if the value stated by the null hypothesis is _____ the confidence interval, then the decision would likely be to reject the null hypothesis

Outside