BUS/ST 350
EXAM 1 Practice Problems
Reiland
Material covered
:
Course Pack
: Lecture Unit 1, Lecture Unit 2
WARNING:
this sample exam may not cover all the material for which you are responsible!
1.
The heights of American men aged 18 to 24 are approximately symmetric and mound shaped with
mean 68 inches and standard deviation 2.5 inches. Half of all young men are shorter than
a) 65.5 inches
b) 68 inches
c) 70.5 inches d) can't tell because the median height is not given
2.
Use the information in Problem 1. What percent of young men are taller than 6' 1" ?
a) 94.5%
b) 44.5%
c) 5.5%
d) 2.5%
3.
The grade point averages (GPA) of 7 randomly chosen students in a statistics class are
3.14
2.37
2.94
3.60
1.70
4.00
1.85
The mean GPA for these students is
a) 2.8
b) 2.94
c) 3.6
d) none of the above
4.
Refer to the information given in the previous problem. If ∑(
xUx)
2
=
4.51, then the standard
deviation is
a) .75
b) .87
c) .64
d) .80
e) none of the above
5.
A standardized test designed to measure math anxiety has a mean of 100 and a standard deviation
of 10 in the population of first year college students. Which of the following observations would
you suspect is an outlier?
a) 150
b) 100
c) 90
d) all of the above
e) none of the above
6.
Which of the following best describes a risk in using the sample range to measure spread?
a) The statistic is not in the same unit of measurement as the observations themselves.
b) The largest or smallest observation may be a mistake or an outlier.
c) It is complicated to compute, which may result in an error.
d) It always produces spreads that are too large.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '08
 reiland
 Business, Standard Deviation, Hard disk drive

Click to edit the document details