Asked by Jane Segurra

What is the probability of randomly selecting a z-score less than z = –0.80 from a normal distribution.
a)-0.2119
b)0.7881
c)0.2119
d)-0.7881

Answers

Answered by Reiny
This can be done without even looking at any tables, assuming the correct answer is in there
First of all, rule out the two negative results, prob's can't be negative
a z score of 0 would be .5
any negative z-score would be < .5
So there is only one choice, namely C) .2119
There are no AI answers yet. The ability to request AI answers is coming soon!

Related Questions