MTH/216T: QUANTITATIVE REASONING II: WEEK 5: FINAL EXAM 1.What is the average?
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A) 2B) 4C) 5D) 10
Answer: C) 5
2.What is the median of these figure skating ratings?
6.06.07.07.07.08.09.0
A) 6.0B) 7.0C) 7.1D) 8.0
Answer: B) 7.0
3.Two owners of a cattle ranch, Jo and Val, want to find the average weight for the ranch’s 200
cows. Instead of weighing all of the cows:
Jo weighs 25 and gets an average weight of 1,350 pounds (stdev 50)
Val weighs 100 cows and gets an average weight of 1,420 pounds (stdev 50)
What is Jo’s margin of error, rounded to the nearest whole number? (The formula is )
A) 10B) 20C) 50D) 529
Answer: B) 20
4.A media personality argues that global temperatures are not rising, because every year an increase is reported such as 0.08 degrees C. The difference from the previous year is less than the margin of error of about 0.15 degrees C, so that difference should be ignored. What is a strong counter argument?
A)Even 0.08 degrees is a lot and thus should be considered.
B)The margin of error is just extra information and thus can be ignored.
C)The difference with any previous decade is much greater than the margin of error.
D)0.15 - 0.08 is 0.07, which is still an increase and thus should be considered.
Answer: C) The difference with any previous decade is much greater than the margin of error.
3458
A) 2B) 4C) 5D) 10
Answer: C) 5
2.What is the median of these figure skating ratings?
6.06.07.07.07.08.09.0
A) 6.0B) 7.0C) 7.1D) 8.0
Answer: B) 7.0
3.Two owners of a cattle ranch, Jo and Val, want to find the average weight for the ranch’s 200
cows. Instead of weighing all of the cows:
Jo weighs 25 and gets an average weight of 1,350 pounds (stdev 50)
Val weighs 100 cows and gets an average weight of 1,420 pounds (stdev 50)
What is Jo’s margin of error, rounded to the nearest whole number? (The formula is )
A) 10B) 20C) 50D) 529
Answer: B) 20
4.A media personality argues that global temperatures are not rising, because every year an increase is reported such as 0.08 degrees C. The difference from the previous year is less than the margin of error of about 0.15 degrees C, so that difference should be ignored. What is a strong counter argument?
A)Even 0.08 degrees is a lot and thus should be considered.
B)The margin of error is just extra information and thus can be ignored.
C)The difference with any previous decade is much greater than the margin of error.
D)0.15 - 0.08 is 0.07, which is still an increase and thus should be considered.
Answer: C) The difference with any previous decade is much greater than the margin of error.
