Posted by Jane Segurra on Wednesday, March 20, 2013 at 8:33pm.
What is the probability of randomly selecting a zscore less than z = –0.80 from a normal distribution.
a)0.2119
b)0.7881
c)0.2119
d)0.7881

Statistics 250  Reiny, Wednesday, March 20, 2013 at 10:04pm
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 zscore would be < .5
So there is only one choice, namely C) .2119
Answer This Question
Related Questions
 STAT 250..Help!  What is the probability of randomly selecting a zscore less ...
 STAT 250..Help!  What is the probability of randomly selecting a zscore less ...
 statistics  A normal distribution has a mean of 100 and standard deviation of ...
 statistics  A population of scores forms a normal distribution with a mean of...
 psyc  A normal distribution has µ = 80 and standard deviation = 10. What is the...
 stat in psyc  A normal distribution has µ = 80 and standard deviation = 10. ...
 statistics  For any distribution (normal or not normal), the probability of ...
 statistics  a normal distribution has a mean of 20 and a standard deviation of ...
 Statistics  A normal distribution has a mean of ƒÝ = 100 with ƒã = 20. If one ...
 statistics  We have a group of 75 people and for their raw scores, you are ...
More Related Questions