1.
While eating in FIU cafeteria, 200 students are asked to perform a taste test in which they drink
from two unmarked cups. They are then asked which drink they prefer.
Identify the
variable of
interest,
the
data collection method, type of the data, and population of interest
to the cafeteria
administration.
2. Standard deck of card contains 52 cards. Find the probability of
:
a) Selecting a spade card
b) Getting a king or a jack
c) Choosing a red card or a queen
d)
If 3 cards are selected
without replacement
find the probability all three are aces?
e)
If 3 cards are selected
without replacement
find the probability of at least one diamond card?
3. Given a sample: 33, 24, 21, 14, 24.
Calculate the variance, S.D., mean, median, mode, range.
4. For each variable described, indicate whether it is nominal, ordinal, discrete or continuous.
____ 1) the number of errors in a onepage letter
___ 2) the brand of jeans preferred by a student
___ 3) the educational level of a child’s mother
___4) the weight of the meat in a chef’s salad
5.
A hair salon did a survey of 360 customers regarding satisfaction with service and type of customer.
A
walkin customer is one who has seen no ads and not been referred.
The other customers either saw a TV
ad or were referred to the salon (but not both). The results follow
Walk In
TV Ad
Referred
Total
Not Satisfied
21
9
5
35
Neutral
18
25
37
80
Satisfied
36
43
59
138
Very Satisfied
28
31
48
107
Total
103
108
149
360
Find the probability that a customer is:
a )
Not satisfied
b)
Very satisfied, given
referred
c)
At least satisfied and
TV Ad
d)
Are the events (A)
satisfied and (B)
referred independent or not?
Prove your answer.
6. Suppose the average height and S.D. of 50
students in a class are 66 inch and 3 inch respectively.
a) If nothing is known about the shape of the distribution, what proportion represents the number of students
outside the interval from 60 to 72 inch?
b) If the heights have a mound shaped and symmetric histogram, what
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 Fall '08
 STAFF
 Standard Deviation, Latin honors, cum laude honors, consumer research company

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