Confidence Intervals

Question 1

name and computation of the value used to describe the level of confidence that the population mean (or mean difference) falls within the range or interval to be calculated

Answer 1

confidence coefficient, 1 - alpha

Question 2

t-values and z-values describe the ___ from the mean known to contain the confidence coefficient (usually 95%) of the normal curve

Answer 2

distance

Question 3

in all computations of confidence intervals, the smaller the standard error of the mean, the ___ the width of the interval

Answer 3

smaller

Question 4

the easiest and most practical way to reduce the size of the standard error of the mean is to increase ___

Answer 4

population size