STAS2126 Assignment #1 (Fall 2008)
The focus of this assignment is to give you practice with basic math skills that you will need during the
course. There will be some terms that you don’t yet understand (e.g., Type 1 error, sum of squares) but
don’t worry about that at this stage because the emphasis is only on the math portion of each question not
understanding the concepts themselves. You will need to be familiar with the order of operations or
BEDMAS rules…For a particular question, do anything in
B
rackets first…next do anything with
Exponents
(5
2
)…next comes any
Division
and
M
ultiplication…the last things you do are
A
ddition
and
S
ubtraction.
Also recall that when squaring a negative number, the answer is always positive (e.g.,
2
2
=4 NOT 4
)
SHOW YOUR WORK
1.
93% of people put peanut butter on first when making a
peanut butter and jelly sandwich. What % put jelly first?
Show work here
100%  93% = 7%
A
0.7%
B
.07
C
7/100
D
70/100
E
7%
F
None of the above
2.
.13 of all pet owners give gifts to their pets on Valentine's
Day.
What is this as a %? (be careful here)
Show work here
.13 x 100 = 13%
A
13/100
B
13/1000
C
.13
D
.013
E
1.3
F
None of the above
3.
What is 8 + 24 ÷ 4 x 2?
Show work here
8 + 24 ÷ 4 x 2
(do division first)
=8 + 6 x 2 (do multiplication next)
=8 + 12
=20
A
11
B
4
C
16
D
20
E
40
F
None of the above
4.
What is 6+(6  1)
2
– 3 x 2
2
Show work here
6+(6  1)
2
– 3 x 2
2
(bracket first)
=6+(5)
2
– 3 x 2
2
(exponents next)
=6+253 x 4
(multiplication next)
=6+2512
=19
A
19
B
4
C
24
D
109
E
25
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 Fall '08
 F.Sicoly
 Addition, Standard Deviation, Work, Cohen, Statistical power

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