Gdetermine the critical values for these tests of a population standard deviation. (a) a right-tailed test with 16 degrees of freedom at the alphaequals0.01 level of significance (b) a left-tailed test for a sample of size nequals23 at the alphaequals0.1 level of significance (c) a two-tailed test for a sample of size nequals31 at the alphaequals0.1 level of significance

Step-by-step explanation:

We are to find critical values for the test given

a) df =16: Alpha = 0.01  and right tailed

Critical value= 2.583

b) df = 23-1 = 22: alpha = 0.1 and left tailed

critical= -1.717

c)df=31-1 =30:  alpha =0.1:  two tailed

t =1.697

Critical values can be obtained from critical t tables.

Left tailed will have negative sign and right tailed positive

step-by-step explanation:

it's is b

a. the are of the rectangle is 18.25

b. 18.25 times two is 36.50

rae me : d