Determine the area under the standard normal curve that lies to the left of (a)

Question

Determine the area under the standard normal curve that lies to the left of (a) Z # " 1. 17, (b) Z-1.67, (c) Zs-0.75, and (d) Zs-1.64. Click the icon to view a table of areas under the normal curve (a) The area to the left of Z=-1.17 is Round to four decimal places as needed.) (b) The area to the left of Z#167 is Round to four decimal places as needed) (c) The area to the left of -0.75 is (Round to four decimal places as needed.) (d) The area to the left of Z =-1.64 is Round to four decimal places as needed.) Enter your answer in each of the answer boxes

Explanation / Answer

Soln,

a) Area to the left of Z =-1.17 is 0.1210.

b)Area to the left of Z = 1.67 will be 0.9525

c) Area to the left of Z= -0.75 will be 0.2266

d)Area to the left of Z= -1.64 will be 0.0505

Again

The correct option is

The histogram is bell shaped so normal distribution could be used as a model for the variables.

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