Practice Quiz

IB Mathematics SL Prep - Question List

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51. The test scores for eight students are 97, 94, 98, 97, 89, 92, 68 and 96. What would the seventh score be considered?
  1. Outlier
  2. Mean
  3. Mode
  4. Standard deviation
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52. A video store is offering a 7% discount on previously viewed videos. If the regular price of a video is $9.99, how much will the discount be?
  1. 63 cents
  2. 70 cents
  3. 74 cents
  4. 77 cents
  5. 80 cents
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53. If Martin invests $20,000 for 20 years and his investment earns 20% interest compounding quarterly, what will it be worth at the end of his investment period?
  1. $991,228.82
  2. $120,000.00
  3. $244,529.20
  4. $424,872.36
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54. It is sunny on 83% of the 120 days Silver Slides Waterpark is open on average. How many days will Silver Slides be open this summer?
  1. 100
  2. 102
  3. 98
  4. 99
  5. 92
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55. The given numbers are daily groundwater elevation readings from a monitoring well taken during a month experiencing snowmelt and extended rainfall events.

7.6 7.7 4.3 5.9 5.0 10.5 7.7 9.5 12.0 12.6 6.5 8.3 8.2 13.2 12.6 13.6 14.1 13.5 11.5 12.0 10.4 10.8 13.1 12.5 10.4 13.0 14.1 15.1

What is the standard deviation of these groundwater elevation readings?
  1. 3.01
  2. 8.76
  3. 9.08
  4. None of the above.
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