Arandom sample of 20 items is selected (from a population with an unknown population standard deviation). when computing a confidence interval for the population mean, what number of degrees of freedom should be used to determine the appropriate t-value?

degree of freedom is 19

Step-by-step explanation:

Given data

sample = 20

to find out

degree of freedom

solution

we know degree of freedom formula

that is

degree of freedom =  sample -1

we have given sample 20

so

degree of freedom = 20 -1

so degree of freedom is 19

the barter

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb