Joe dealt 20 cards from a standard 52-card deck, and the number of

Joe dealt 20 cards from a standard 52-card deck, and the number of

Question 4 of 40 0.0/ 2.5 Points

Joe dealt 20 cards from a standard 52-card deck, and the number of red cards exceeded the number of black cards by 8. He reshuffled the cards and dealt 30 cards. This time, the number of red cards exceeded the number of black cards by 10. Determine which deal is closer to the 50/50 ratio of red/black expected of fairly dealt hands from a fair deck and why.

 

 

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 5 of 40

 0.0/ 2.5 Points

A study of 600 college students taking Statistics 101 revealed that 54 students received the grade of A. Typically 10% of the class gets an A. The difference between this group of students and the expected value is not significant at the 0.05 level. What does this mean in this case?

 

 

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 6 of 40

 0.0/ 2.5 Points

Jody checked the temperature 12 times on Monday, and the last digit of the temperature was odd six times more than it was even. On Tuesday, she checked it 18 times and the last digit was odd eight times more than it was even. Determine which series is closer to the 50/50 ratio of odd/even expected of such a series of temperature checks.

 

 

A. The Monday series is closer because 1/6 is closer to 1/2 than is 1/8.
 

B. The Monday series is closer because 6/12 is closer to 0.5 than is 8/18.
 

C. The Tuesday series is closer because the 13/18 is closer to 0.5 than is 9/12.
 

D. The series closest to the theoretical 50/50 cannot be determined without knowing the number of odds and evens in each series.

 

Question 10 of 40 0.0/ 2.5 Points

If you flip a coin three times, the possible outcomes are HHH, HHT, HTH, HTT, THH, THT, TTH, TTT. What is the probability of getting at most one head?

 

 

A. 4/9
 

B. 5/6
 

C. 7/8
 

D. 5/8
Question 11 of 40

 0.0/ 2.5 Points

A study of two types of weed killers was done on two identical weed plots. One weed killer killed 15% more weeds than the other. This difference was significant at the 0.05 level. What does this mean?

 

 

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 10 of 40 0.0/ 2.5 Points

If you flip a coin three times, the possible outcomes are HHH, HHT, HTH, HTT, THH, THT, TTH, TTT. What is the probability of getting at most one head?

 

 

A. 4/9
 

B. 5/6
 

C. 7/8
 

D. 5/8
Question 11 of 40 0.0/ 2.5 Points

A study of two types of weed killers was done on two identical weed plots. One weed killer killed 15% more weeds than the other. This difference was significant at the 0.05 level. What does this mean?

 

 

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 10 of 40 0.0/ 2.5 Points

If you flip a coin three times, the possible outcomes are HHH, HHT, HTH, HTT, THH, THT, TTH, TTT. What is the probability of getting at most one head?

 

 

A. 4/9
 

B. 5/6
 

C. 7/8
 

D. 5/8
Question 11 of 40 0.0/ 2.5 Points

A study of two types of weed killers was done on two identical weed plots. One weed killer killed 15% more weeds than the other. This difference was significant at the 0.05 level. What does this mean?

 

 

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.

 

Suppose you have an extremely unfair die: The probability of a 6 is 3/8, and the probability of each other number is 1/8. If you toss the die 32 times, how many twos do you expect to see?

 

 

A. 2
 

B. 4
 

C. 3
 

D. 5

Suppose you have an extremely unfair die: The probability of a 6 is 3/8, and the probability of each other number is 1/8. If you toss the die 32 times, how many twos do you expect to see?

 

 

A. 2
 

B. 4
 

C. 3
 

D. 5

 

Question 16 of 40 0.0/ 2.5 Points

Of 1308 people who came into a blood bank to give blood, 314 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure (to 3 decimal places).

 

 

A. 0.250
 

B. 0.490
 

C. 0.240
 

D. 0.160

 

Question 18 of 40 0.0/ 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 18 of 40 0.0/ 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 18 of 40 0.0/ 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

 

 

Which graph has two groups of data, correlations within each group, but no correlation among all the data?

 

 

A.

 
 

B.

 
 

C.

 
 

D.

 

 

 

A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.

 

 

A. 28.0 to 30.0
 

B. 25.0 to 27.0
 

C. 29.0 to 31.0
 

D. 27.0 to 29.0
Question 32 of 40

 0.0/ 2.5 Points

Among a random sample of 150 employees of a particular company, the mean commute distance is 29.6 miles. This mean lies 1.2 standard deviations above the mean of the sampling distribution. If a second sample of 150 employees is selected, what is the probability that for the second sample, the mean commute distance will be less than 29.6 miles?

 

 

A. 0.8849
 

B. 0.5
 

C. 0.1131
 

D. 0.1151
Question 33 of 40

 0.0/ 2.5 Points

Which line of the three shown in the scatter diagram below fits the data best?

 

 

 

A. A
 

B. B
 

C. C
 

D. All the lines are equally good
Question 34 of 40

 0.0/ 2.5 Points

Select the best fit line on the scatter diagram below.

 

 

 

A. A
 

B. B
 

C. C
 

D. All of the lines are equally good
Question 35 of 40

 0.0/ 2.5 Points

The scatter plot and best-fit line show the relation between the price per item (y) and the availability of that item (x) in arbitrary units. The correlation coefficient is -0.95. Determine the amount of variation in pricing explained by the variation in availability.

 

 

 

A. 5%
 

B. 10%
 

C. 95%
 

D. 90%
Question 36 of 40

 2.5/ 2.5 Points

Select the best fit line on the scatter diagram below.

 
A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.

 

 

A. 28.0 to 30.0
 

B. 25.0 to 27.0
 

C. 29.0 to 31.0
 

D. 27.0 to 29.0
Question 32 of 40 0.0/ 2.5 Points

Among a random sample of 150 employees of a particular company, the mean commute distance is 29.6 miles. This mean lies 1.2 standard deviations above the mean of the sampling distribution. If a second sample of 150 employees is selected, what is the probability that for the second sample, the mean commute distance will be less than 29.6 miles?

 

 

A. 0.8849
 

B. 0.5
 

C. 0.1131
 

D. 0.1151
Question 33 of 40 0.0/ 2.5 Points

Which line of the three shown in the scatter diagram below fits the data best?

 

 

 

A. A
 

B. B
 

C. C
 

D. All the lines are equally good
Question 34 of 40 0.0/ 2.5 Points

Select the best fit line on the scatter diagram below.

 

 

 

A. A
 

B. B
 

C. C
 

D. All of the lines are equally good
Question 35 of 40 0.0/ 2.5 Points

The scatter plot and best-fit line show the relation between the price per item (y) and the availability of that item (x) in arbitrary units. The correlation coefficient is -0.95. Determine the amount of variation in pricing explained by the variation in availability.

 

 

 

A. 5%
 

B. 10%
 

C. 95%
 

D. 90%
 

 

Question 36 of 40 2.5/ 2.5 Points

Select the best fit line on the scatter diagram below.

 
 

A. A
 

B. B
 

C. C
 

D. None of the lines is the line of best fit

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