Use the following
Find the endpoint(s) on the normal density curve with the given property.
-The symmetric middle area on a N(66, 6) curve is about 0.9.
A) 54.241 and 77.759
B) 56.131 and 75.869
C) 61.953 and 70.047
D) 59.098 and 72.902

Question

Quizplus · Accepted Answer

The symmetric middle area of 0.9 on a normal distribution curve corresponds to the central 90% of the data. For a N(66, 6) distribution, the endpoints can be found using the z-scores that correspond to the 5th and 95th percentiles, which are approximately -1.645 and 1.645. Calculating these values gives endpoints of approximately 56.131 and 75.869.

Use the Following Find the Endpoint(s) on the Normal Density Curve with the Curve