Find the critical value z/2 that corresponds to a confidence level of 92.5%.

You may use technology (TI-84) and/or Table A-1 to find it. Round your answer to 2 places after the decimal point (if necessary).

TI-84:

PROGRAM: INVT

: Input "AREA TO LEFT: ", A

: Input "DF: ", D

: 1S

: If A

: Then

: -1S

: End

: abs(2*A-1)A

: TInterval 0,(D+1),(D+1),A

: Disp upper*S

:

Table A-1: