math exam 3 - Norman93
sarkha1
math_exam_3.docxThe batting averages of the first three batters in the Eureka College women’s softball team lineup are .310, .301, and .277. If the first three batters are considered as the “lead-off group”, what is the batting average of the group?
|
|
|
A. .301 |
|
||||||||||
|
B. .296 |
|
||||||||||
|
C. There is insufficient information to answer the question |
|
||||||||||
|
D. None of the above |
|
||||||||||
Al and Joe are two county sheriff’s deputies assigned to watch for traffic violations. Their arrest and conviction records for May and June are shown below.
Who had the best conviction percentage overall?
|
|||||||||||
Find the mode(s) for the given sample data. 66, 25, 66, 13, 25, 29, 56, 66
|
|||||||||||
|
5.0 Points |
Find the mode(s) for the given sample data. 20, 49, 46, 43, 49, 43, 49, 20, 22
|
|
|
A. 43 |
|
|
B. 49 |
|
|
C. 20 |
|
|
D. 22 |
|
|
Question 8 of 20 |
5.0 Points |
A softball player has a batting average of exactly .300 and no more than 60 times at bat. Suppose this player gets 5 hits in her next 6 times at bat. What is the highest possible average she could now have?
|
|
|
A. .500 |
|
||||||||||
|
B. .833 |
|
||||||||||
|
C. .348 |
|
||||||||||
|
D. There is insufficient information to answer the question |
|
||||||||||
Consider the distribution of heights of all the players in the National Basketball Association. What would you expect the shape of the distribution to be?
|
|||||||||||
Use the range rule of thumb to approximate the standard deviation. 496,598, 503, 528, 565, 601, 576, 543
|
|||||||||||
The grocery expenses for six families were $80.86, $47.74, $57.92, $81.08, $75.18, and $88.08. Compute the mean grocery bill. Round your answer to the nearest cent.
|
|||||||||||
|
Question 12 of 20 |
5.0 Points |
Find the standard deviation for the given data. Round your answer to one more decimal place than the original data. 22, 29, 21, 24, 27, 28, 25, 36
|
|
|
A. 4.8 |
|
||||||||||
|
B. 4.2 |
|
||||||||||
|
C. 2.8 |
|
||||||||||
|
D. 1.6 |
|
||||||||||
Al and Joe are two county sheriff’s deputies assigned to watch for traffic violations. Their arrest and conviction records for May and June are shown below.
Who had the best conviction percentage in June?
|
|||||||||||
|
Question 14 of 20 |
5.0 Points |
Suppose that your income is at the 81st percentile of wage earners in the United States. What percent of wage earners make more than you do?
|
|
|
A. 19% |
|
|
B. 81% |
|
|
C. Cannot be calculated from the information given |
|
|
D. None of the above |
|
Last year, a road construction firm hired 11 new employees. Their ages at hiring are listed below. Find the mean hiring age to one decimal place. 23 19 30 33 27 31 58 22 21 26 29
|
|||||||||||
The following data set is the GPAs of the students in a statistics class. 1.93, 1.99, 2.00, 2.04, 2.12, 2.34, 2.55, 2.55, 2.75, 2.75, 2.80, 2.80, 2.85, 3.02, 3.12, 3.22, 3.31, 3.33, 3.45, 3.69 What percentile is a GPA of 2.34?
|
|||||||||||
The federal government requires a car manufacturer to have a minimum miles per gallon (mpg) average over the models it makes. Suppose that the average mpg for the four models manufactured is 24 mpg and the government standard is 31 mpg. The manufacturer will add a model. What mileage must the new model get so that the manufacturer meets the government requirement?
|
|||||||||||
The weights (in ounces) of 21 cookies are shown. Find the median weight. 0.62 1.25 0.60 1.62 0.75 0.74 1.35 1.25 1.53 0.99 0.62 1.25 1.28 0.66 0.47 1.25 0.74 1.28 1.72 0.75 0.56
|
|||||||||||
|
5.0 Points |
The mathematics SAT scores of the seven students in a mathematics seminar are 538, 550, 570, 593, 610, 622, and 634. Suppose the student with the score 634 drops the seminar and is replaced by a student with a score of 600. What will happen to the mean and the median scores of the class?
|
|
|
A. Neither mean nor median will change. |
|
|
B. The median will decrease, the mean will not change. |
|
|
C. The median will not change, the mean will decrease. |
|
|
D. Both mean and median will decrease. |
|
|
5.0 Points |
The host of a dinner party purchases wine based on the weighted average of clarity (10%), bouquet (5%), friendliness to the palate (5%), storage ability of opened bottles (40%), and price (40%). Suppose that Bone Ranch Wave has scores in these categories of 4, 5, 3, 8, and 9, respectively. What is its rating?
|
|
|
A. 5.80 |
|
|
B. 5.00 |
|
|
C. 7.60 |
|
|
D. None of the previous |
|
