statistical analysis exam 6
Question 1 of 40 
2.5 Points 
A. 2/6


B. 3/6


C. 4/6


D. 5/6

Question 2 of 40 
2.5 Points 
A. 0.345


B. 0.425


C. 0.587


D. 0.592

Question 3 of 40 
2.5 Points 
A. The probability that the difference occurred due to chance is less than 0.05.


B. The probability of getting an A is 10% and only 9% got an A in this study. The difference is less than 5% so it is not significant.


C. There is not enough information to make any conclusion.


D. The probability that the difference occurred due to chance is more than 0.05.

Question 4 of 40 
2.5 Points 
A. 0.6


B. 0.4


C. 0.7


D. 0.8

Question 5 of 40 
2.5 Points 
HTT, THH, THT, TTH, TTT. What is the probability of getting at least one head?
A. 4/9


B. 5/6


C. 7/8


D. 5/8

Question 6 of 40 
2.5 Points 
A. The second series is closer because the difference between odd and even numbers is greater than the difference for the first series.


B. The first series is closer because the difference between odd and even numbers is less than the difference for the second series.


C. Since 1/2 > 1/5 > 1/11, the first series is closer.


D. The series closer to the theoretical 50/50 cannot be determined unless the total number of rolls for both series is given.

Question 7 of 40 
2.5 Points 
A. The probability that the difference was due to chance alone is greater than 0.01.


B. There is less than a 0.01 chance that the first groupâ€™s grades were better by chance alone.


C. The improvement was due to the fact that more people studied.


D. There is not enough information to make any conclusion.

Question 8 of 40 
2.5 Points 
A. 1/4


B. 3/4


C. 2/16


D. 3/16

Question 9 of 40 
2.5 Points 
A. 1/5


B. 1/6


C. 1/4


D. 2/5

Question 10 of 40 
2.5 Points 
A. The first series is closer because 1/10 is farther from 1/2 than is 1/8.


B. The series closer to the theoretical 50/50 cannot be determined unless the number of red and black cards for each deal is given.


C. The second series is closer because 20/30 is closer to 1/2 than is 14/20.


D. The first series is closer because the difference between red and black is smaller than the difference in the second series.

Question 11 of 40 
2.5 Points 
A. 1/8


B. 3/8


C. 5/8


D. 6/8

Question 12 of 40 
2.5 Points 
The data set represents the income levels of the members of a country club. Estimate the probability that a randomly selected member earns at least $98,000.
112,000 126,000 90,000 133,000 94,000 112,000 98,000 82,000 147,000 182,000 86,000 105,000
140,000 94,000 126,000 119,000 98,000 154,000 78,000 119,000
A. 0.4


B. 0.6


C. 0.66


D. 0.7

Question 13 of 40 
2.5 Points 
A. 2


B. 4


C. 3


D. 5

Question 14 of 40 
2.5 Points 
The distribution of B.A. degrees conferred by a local college is listed below, by major.
Major Frequency
English 2073
Mathematics 2164
Chemistry 318
Physics 856
Liberal Arts 1358
Business 1676
Engineering 868
9313
What is the probability that a randomly selected degree is not in Business?
A. 0.7800


B. 0.8200


C. 0.8300


D. 0.9200

Question 15 of 40 
2.5 Points 
A. The improvement was due to the fact that there were more weeds in one study.


B. The probability that the difference was due to chance alone is greater than 0.05.


C. The probability that one weed killer performed better by chance alone is less than 0.05.


D. There is not enough information to make any conclusion.

Question 16 of 40 
2.5 Points 
A. 12


B. 22


C. 24


D. 26

Question 17 of 40 
2.5 Points 
A. 1/2


B. 2/3


C. 3/4


D. 4/9

Question 18 of 40 
2.5 Points 
A. 1/24


B. 1/46


C. 1/32


D. 1/18

Question 19 of 40 
2.5 Points 
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