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 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?

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 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?


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 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?

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 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.


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?


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


Select the best fit line on the scatter diagram below.


The scatter plot and bestfit 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.


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.


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?


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


Select the best fit line on the scatter diagram below.


The scatter plot and bestfit 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.


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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