Preparatory Quiz for Epidemiology

Preparatory Quiz for Epidemiology
1. Express 0.01% as a ratio. Which answer is correct?
(a) 1/100
(b) 1/1000
(c) 1/10,000
(d) 1/100,000
(e) 1/1,000,000

0.01% = 0.0001=1/10,000 – (c) is correct

2. What does 10-5 mean? Which answer is correct?
(a) 1/100
(b) 1/1000
(c) 1/10,000
(d) 1/100,000
(e) 1/1,000,000

10-5 means 0.00001 = 1/100,000 – (d) is correct

3. Express 10-5 in a number with decimal places. Which answer is correct?
(a) 0.1
(b) 0.01
(c) 0.001
(d) 0.0001
(e) 0.00001

10-5 means 0.00001 – (e) is correct

4. Calculate the following expression to one decimal point:

 

The expression can also be written as

 

 

 
5. Solve the following equation for A:

 

6. Express 320 / 1280 as a percent. Which answer is correct?
(a) 0.25%
(b) 2.5%
(c) 25%
(d) 40.0%
(e) 4.0%

320/1280 = 0.25 or 25.0% – c is correct

7. Solve the following for X:

97.4% of 529 = X

X = 529 x 0.974 = 515.246
515.246 is 97.4 % of 529

8. If something happens on average 3 times every month, about how often will it happen in a year?

A year has 12 months and so we would expect this “something” to happen 3 x 12 = 36 times in one year.

9. Complete the following table:

Infected Not Infected Total
Ate Fish 215 160 375
Ate Steak 190 230 420
Total 405 390 795

10. Put the information in the following scenario into the table below, and fill in the missing boxes:

• There are 15,270 people 15 years of age or older.
• 5,040 are 55+, and half of those people smoke.
• 14.5% of the total population is 15-18, and 340 of those youths are smokers.
• The remaining population is equally split between the 19-25 and 26-55 groups.
• 60% of 19-25 year olds smoke.
• 1,250 of the 26-55 year olds smoke.
Age # Smokers # People % Smokers
15-18 340 2214 15.4%
19-25 2405 4008 60.0%
26-55 1250 4008 31.2%
55+ 2520 5040 50.0%
Total 6515 15270 42.7%
11. (a) If your car uses 8.5 liters of unleaded fuel to travel 100km, how far can you travel with a full tank of 63 liters until it is empty?

(b) A vial of a medication contains 250 mg in 5ml. How many ml do you need to prepare to give someone 90 mg of this medication?

(a) 8.5 litres for 100km, hence 63 litre will travel 741.2km.
(b) 250mg in 5ml, hence 90mg in 1.8ml.

It is important that you possess and are able to handle a calculator proficiently!

 

 

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