This preview shows pages 1–3. Sign up to view the full content.
Assigned EvenNumbered Homework Solutions
Statistics for Business and Economics.
McClave, Benson, Sincich.
11
th
edition, Prentice
Hall.
4.90
Draw pictures!
a.
The zscore corresponding to x
0
is 1.00.
So
1.0
= (x
0
– 50) / 3
> x
0
= 53
b.
The zscore corresponding to x
0
is 1.96.
So
1.96 = (x
0
– 50) / 3
> x
0
= 55.88
c.
The zscore corresponding to x
0
is –1.645.
So
–1.645 = (x
0
– 50) / 3
> x
0
= 45.065
d.
For this one, we need to know how much area is between 41 and 50 first:
The zscore corresponding to 41 is
z = (41 – 50) / 3 = –3
From the table, we know the area under the curve between a zscore of –3 and 0 is .4987.
That means there is .8630 – .4987 = .3643 left between 50 and x
0
.
The zscore corresponding to x
0
is 1.10.
So
1.10 = (x
0
– 50) / 3
> x
0
= 53.3
e.
The zscore corresponding to x
0
is –1.28.
So
–1.28 = (x
0
– 50) / 3
> x
0
= 46.16
f.
The zscore corresponding to x
0
is 2.33.
So
2.33 = (x
0
– 50) / 3
> x
0
= 56.99
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document4.158
a.
First we find the sample mean for each of the samples listed:
This is the end of the preview. Sign up
to
access the rest of the document.
 Fall '08
 CRISSINGER
 Statistics

Click to edit the document details