Question 1
1 / 1 pts
We made a Survey with a Sample Size of 192 Barry students.

We ask them: "What is your favorite Animal" and 32 of them say dog.

What is the population of the Survey? and proportion of dog lovers in the Sample.

Dog Lovers
Correct!
Barry students, 32/192
32
192, 16%

Question 2
0 / 1 pts
I toss 4 fair Coins. What is the probability of 2 head and 2 tail?

P(2)=

Correct Answer
37.5%
50%
You Answered
25%
100%

Question 3
2 / 2 pts
Given the following Stem And Leaf Calculate the probability of more than 35

2| 1 3 9 9

3| 1 2 4 5 7 7 8 9

4| 1 2 5 7 8 8

5| 0 0 0



P(>35)

10%
50%
Correct!
62%
57.3%

Question 4
0 / 4 pts
Use The Midpoint Method to Calculate an approximation to the Average of the following Table Frequency.

Av=

Class Freq Mid point
20-22 1
23-25 2
26-28 5
29-31 2
32-34 1
35-37 1
Correct Answer
27.75
29
None
You Answered
27

Question 5
0 / 4 pts
Given the following Summary calculate the Probability of Smoking a lot among Women.

P(ALot|Women)

Gender\Smokes ALot ALittle Nothing Total
Men 35 100
Women 20 9
Total 43 300
19%
You Answered
6.67%
Correct Answer
15%
20/55

Question 6
3 / 3 pts
40% of the houses in Miami are for Blue, and 60% of other colors.

What is the probability that 5 houses are Blue, in a list of 10 houses selected at Random in the city of Miami?

P(5)=

Correct!
20%
20
36.6
80%

Question 7
3 / 3 pts
Given the following Data Set for a Sample, build a 83% CI=(a, b) for the Average.

X={3.2, 3.7, 1.9, 2.3, 2.7, 2.9, 3.4, 1.7, 0.9}

CI=(a, b)

(1.35, 2.5)
2
Correct!
(2.06, 2.98)
33%

Question 8
0 / 1 pts
Calculate the Probability that the Z table take a value greater than 2.1

P(Z>2.1)=

Correct Answer
1.8%
0.09
3%
You Answered
98%

Question 9
1 / 1 pts
Calculate the Z value of Top 10% in the Normal Standard Distribution.

Z(Top 10%)=

0.1257
Correct!
1.282
-1.282
1.282%

Question 10
1 / 1 pts
Calculate the Z critical of a confidence=68%

Zc=

-1
0.68
2.7
Correct!
1

Question 11
2 / 2 pts
The experiment Consists on tossing one fair die:

Two Events are defined.

A=Even={2, 4, 6}

B=<5={1, 2, 3, 4}

P(A AND B)=

1/6
3/6
Correct!
1/3
4/6

Question 12
1 / 1 pts
Given the 93% Confidence Interval CI=(a, b) =(321, 1000), Calculate the Average
600
160.5
500
Correct!
Av= 660.5

Question 13
1 / 1 pts
Given a 93% CI=(a, b)=(321, 1000) Calculate the Error
678
100
50.5
Correct!
Error=339.5

Question 14
0 / 3 pts
Given the 93% Confidence Interval CI=(a, b) =(321, 1000), Calculate the standard deviation
s=1321/4
Z(0.93)=1.812
You Answered
s=339.5
Correct Answer
s=187

Question 15
0 / 2 pts
Mary took the Sat test: She scored 67.3 Points.

Peter took the GRE Test and scored 1239 Points.

Robert took the Placement test and obtained 500 points

Sat test Average was 50 points with an standard deviation of 20 points

GRE test Average was 1000 points and s=200 points

Placement test Av=500

Who did better?

Correct Answer
Peter
Mary
You Answered
Robert
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