An upper tail area should be found since the test statistic,z=2.86, is positive. The area under the curve to the right of az-valuecorresponds to the upper tail area. Recall that the standard normal table gives the area to the left ofz-valuesand the entire area under the curve is 1. Therefore, the upper tail area will be the difference of the whole area, 1, and the area to the left of

z=2.86.

Use thestandard normal tableto find the upper tail area for

z=2.86,

rounding the result to four decimal places.

area to the right of2.86	=	1area to the left of2.86
	=	1 _______
	=	_________

https://www.webassign.net/aswsbe13/appendix-b.pdf