yellow123 Posts: 8, Reputation: 1 New Member #1 Apr 4, 2011, 07:11 PM
Statistic
For a normal distribution, identify the z-score location that would separate the distribution into two sections so that there is
a) 70% in the body on the right hand side
b) 80% in the body on the right hand side
c) 75% in the body on the left hand side
d) 90% in the body on the left hand side
 galactus Posts: 2,271, Reputation: 282 Ultra Member #2 Apr 5, 2011, 07:10 AM

a. look up the z score corresponding to a .70 in the body of the table.

b. same as above only look up .20

c. z scores come from the left and go right. So, just look up .75 in the body of the table

d. look up .90

These are just exercises in locating z scores and reading the z table.
 Unknown008 Posts: 8,076, Reputation: 723 Uber Member #3 Apr 5, 2011, 12:15 PM

Also, draw a picture of each of the distributions and the percentages concerned. There are z values which will be negative.

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