Pre-assessment Answers
C784/L121 Applied Healthcare Statistics
A blank copy of the Pre-assessment is available here. The answers to each question along with
short explanations are below.
1. 100: The product of the integers is 25 × -2 × 2 × -1 = 100. (Note that 2.5 is not an integer.)
2. +/-8: 64 is the ONLY whole number. The square roots of 64 are ± 8.
3. 49: Use PEMDAS-> 5 × (3)^2 + 4 = 5 × 9 + 4 = 45 + 4 = 49
4. 44: Use PEMDAS-> 12 + 2 × (4)^2 = 12+ 2 × 16 = 12 + 32 = 44
5. 24: 24 is the largest number that divides evenly into both 48 and 72.
6. 12: 12 is the largest number that divides evenly into both 24 and 84.
7. 2: 12 ÷ 1
4 = 1
2 × 4
1 = 4
2 = 2
11
8. 12 : 23 + 1
4 = 8
12 + 3
12 = 11
12
9. 401.6: Nearest tenth implies answer to one decimal point. After adding the 3 amounts, the
total is 401.55, which to the nearest tenth is 401.6.
10. 0.037: (0.5475-0.3025) × 0.15 = 0.03675, which rounds to 0.037 in the thousandths place.
11. 2.68: The word sum refers to addition. Adding all the numbers yields a sum of 2.6819,
which rounds to 2.68 in the hundredths place.
12. 147.5: 59kg × 2.5mg/kg = 147.5mg
13. 0.48: 80% of 600g is 0.80 × 600g = 480g. This answer must be converted to kilograms as
follows: 480g × 1kg/1000g = 0.48kg.
14. 38.9: The formula is C = 5/9 × (F - 32). So, C = 5/9 × (102 - 32) = 38.8888…, which is
rounded to 38.9.
7
15. - 12 : Subtract 5/4 from both sides-> x = 23 - 54 = 8
12
15
- 12 7
= - 12
, 23
16. 12 : Add 5/4 to both sides-> x = 23 + 54 = 8
12
15
+ 12 = 23
12
17. : The distributive property gives 2y + 6 > y - 5.
Subtracting 6 and y from both sides yields y > -11. This means the correct graph has an open
circle at -11, with the shading to the right of that point (because the symbol in our answer is >).
18. : y > 6 means y is greater than 6. So we shade
numbers bigger than 6 but put an open circle at 6 to indicate that 6 is not included.
19. : The y-intercept is 7, and the
slope is positive -- so the line goes up from left to right.
20. : The y-intercept is -8, and the
slope is positive -- so the line goes up from left to right.
C784/L121 Applied Healthcare Statistics
A blank copy of the Pre-assessment is available here. The answers to each question along with
short explanations are below.
1. 100: The product of the integers is 25 × -2 × 2 × -1 = 100. (Note that 2.5 is not an integer.)
2. +/-8: 64 is the ONLY whole number. The square roots of 64 are ± 8.
3. 49: Use PEMDAS-> 5 × (3)^2 + 4 = 5 × 9 + 4 = 45 + 4 = 49
4. 44: Use PEMDAS-> 12 + 2 × (4)^2 = 12+ 2 × 16 = 12 + 32 = 44
5. 24: 24 is the largest number that divides evenly into both 48 and 72.
6. 12: 12 is the largest number that divides evenly into both 24 and 84.
7. 2: 12 ÷ 1
4 = 1
2 × 4
1 = 4
2 = 2
11
8. 12 : 23 + 1
4 = 8
12 + 3
12 = 11
12
9. 401.6: Nearest tenth implies answer to one decimal point. After adding the 3 amounts, the
total is 401.55, which to the nearest tenth is 401.6.
10. 0.037: (0.5475-0.3025) × 0.15 = 0.03675, which rounds to 0.037 in the thousandths place.
11. 2.68: The word sum refers to addition. Adding all the numbers yields a sum of 2.6819,
which rounds to 2.68 in the hundredths place.
12. 147.5: 59kg × 2.5mg/kg = 147.5mg
13. 0.48: 80% of 600g is 0.80 × 600g = 480g. This answer must be converted to kilograms as
follows: 480g × 1kg/1000g = 0.48kg.
14. 38.9: The formula is C = 5/9 × (F - 32). So, C = 5/9 × (102 - 32) = 38.8888…, which is
rounded to 38.9.
7
15. - 12 : Subtract 5/4 from both sides-> x = 23 - 54 = 8
12
15
- 12 7
= - 12
, 23
16. 12 : Add 5/4 to both sides-> x = 23 + 54 = 8
12
15
+ 12 = 23
12
17. : The distributive property gives 2y + 6 > y - 5.
Subtracting 6 and y from both sides yields y > -11. This means the correct graph has an open
circle at -11, with the shading to the right of that point (because the symbol in our answer is >).
18. : y > 6 means y is greater than 6. So we shade
numbers bigger than 6 but put an open circle at 6 to indicate that 6 is not included.
19. : The y-intercept is 7, and the
slope is positive -- so the line goes up from left to right.
20. : The y-intercept is -8, and the
slope is positive -- so the line goes up from left to right.
