Car Study
Spending Study
brand
Chrysler
Ford
GM
Toyota
Honda
Other Japanese
European
Other
Total
no. of cars
150
100
123
65
78
42
37
5
600
Category
Food
Housing
Transportation
Entertainment
Other
Total
Amount
$10,000
$15,000
$7,000
$3,500
$2,000
$37,500
B

73-202-01/02 Spot Quiz 2 Fall, 2016
Last Name 5 O l n 3 First Name
-_
Signature Student No.
1. Determine the value of 2 such that P(-z < Z < z) = .9328
it" -5
.0336
*3 2r
2. If p = 15 and o = 3, determine the value on such that PiY > y) = .05
g

73-202-01/02 Spot Quiz 3 Fall, 2016
Last Name 3; \ ti; 5. First Name
Signature Student No.
In the past, an independently owned retail store offered seniors a 10% discount on their purchases on
Thursdays. Last year, as a marketing gimmick, it increased

Exercise 2
a) Last year, a random sample of 150 Canadians revealed that 35 went on at least one vacation of
3 days or more. This year, a random sample of 250 Canadians revealed that 40 went on at least
one vacation of 3 days or more. At a = .05, is there

Exercise 1
Suppose we want to test whether the average daily number of customers per day at a particular
restaurant is greater this year compared to last year. To test this, suppose we looked at the number of
customers the restaurant had each day for a ra

Exercises Based on Chapter 11 Material and Chapter 11 Notes
1. Assuming that the average cost to a buffet restaurant for food eaten per customer is normally
distributed with a mean of $7.75 with a standard deviation of $2.25.
,u= 1.1g q-=2.9_-s Z=g
What

6:)
" |-.1777. H72.- P 7 a,
m \4", P: Flo vJbtde, s O 2.2.
I: P-v. lo
(.4) no
(.5) N
U-) no
ange :9; (58-4- 6:21.; \2.
Q 91:; 5(9 281T
(1") hp = 33+L'Og) = lq-Z 2. to
"L , 33.43:) = 36%3\ 3L1:
3944\9 7. 9: a.\.\. CMLlisn-n wCW
Pwwe -PCz >620 r

I.
Splns 73~202 Mum; 1:41,ng
Question One (3 marks)
Calculate the following probabilities:
a) P(Z>-2.17) : 1,oxso sifliSS'DJO
I
4/
-2? D %
b)P(Z<O.27) .~. l,eocfw_'lo
,zg23\
0.1-1 2
c) P(-1.27<Z<1.72) . qg7g-.1020 1-0
A;
_\.?:I o 1.79-
I
Question Two (

Why probability and statistics?
Its the last play of a football game. The team with the ball is losing by 5 points and needs to
score a touchdown on this last play to win the game.
An entrepreneur wants to invest $100,000 in one of two businesses up for s

Car Study
Spending Study
brand
Chrysler
Ford
GM
Toyota
Honda
Other Japanese
European
Other
Total
no. of cars
150
100
123
65
78
42
37
5
600
Category
Food
Housing
Transportation
Entertainment
Other
Total
Amount
$10,000
$15,000
$7,000
$3,500
$2,000
$37,500
B

Type of data (and measurement level)
Types of data or variables can be defined as being:
o quantitative (numerical, e.g., a persons current weight, a persons
preferred outdoor temperature, a working Windsorites starting salary, the
number of family member

Chapter 1 Key Concepts/Definitions
statistics the science of collecting, organizing, analyzing, interpreting and presenting sample data
population an entire data set of interest
sample a subset of the entire data set of interest
parameter - a single numer

Income Distributions
Frequency Table
Annual Income ($1000's)
<= 0
0 to 20
20 to 40
40 to 60
60 to 80
80 to 100
100 to 120
120 to 140
> 140
Totals
Group A Group B Group C Group D
0
0
0
0
3
84
3
40
15
55
10
50
45
40
20
25
65
25
33
7
45
14
46
25
15
6
59
50
3

What is statistics?
Statistics is about a complete set of data (population) and wanting to know the
unknown truth (a numerical measure of that population (parameter) or the
pattern of the populations data).
Statistics is about obtaining a subset (sample)

Question One (4 marks)
Match the following scenarios with the correct formula to use by inserting the appropriate letter
beside the formula. cfw_One formula will not be assigned a letter.) Hint: Underline or highlight the key
words in each of the scenario

Problem 1
If we take a random sample of size 25 from a very large normally distributed population with a mean of
200 and a standard deviation of 16, determine the following:
3) PW >205) ._. ?C-2. .7 205 -2.Do
IBIE
: . :PCZ'; use) A
f - a- : . gq
9 Lie