7 Consider the population of four families with the following data representing
ID: 3441841 • Letter: 7
Question
7
Consider the population of four families with the following data representing the number of television sets each family owns.
You plan to take a sample of size 3. How many possible samples of size 3 are there?
a)
6
b)
15
c)
18
d)
20*
8
What is the E(x) in this problem?
a)
2.00
b)
2.25
c)
2.50*
d)
2.75
e)
3.00
7
Consider the population of four families with the following data representing the number of television sets each family owns.
You plan to take a sample of size 3. How many possible samples of size 3 are there?
a)
6
b)
15
c)
18
d)
20*
8
What is the E(x) in this problem?
a)
2.00
b)
2.25
c)
2.50*
d)
2.75
e)
3.00
Explanation / Answer
7.
There are 6 families here.
Thus, there are 6C3 = 20 samples. [ANSWER]
*******************
8.
E(x) = mean number of Tv's = (4+3+3+1+2+2)/6 = 15/6 = 2.5 [ANSWER, C]
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