Mathematical Content

Question 1

explain how to calculate a percentage?

Answer 1

YOU KNOW HOW

Question 2

explain how to convert a percentage to decimal?

Answer 2

• move decimal two places to the left

- 37%= 0.37

Question 3

explain how to convert a decimal into a fraction?

Answer 3

• work out the number of decimal places
  
  • 0.81= 2 decimal places= divide by 100
  • 0.814= 3 decimal places= divide by 1000
• or by finding the highest common factor

Question 4

explain how to use ratios?

Answer 4

• 6 people drank the energy drink out of 10=

- 6:10=3:5

Question 5

explain how to calculate estimates?

Answer 5

• necessary to comment on the mean/range of data

- range= the largest number minus the smallest

Question 6

explain interpreting mathematical symbols?

Answer 6

= equal 
< less than
> greater than
<< much less than
>> much greater than 
*infinity sign* proportional to 
~*two squiggles* weak approximtion

Question 7

explain probability?

Answer 7

• accepted level of probability is 0.05
• when p=0.05 means that there is a 5% chance that the results from the study would have occurred anyways, and a 95% that there is a real difference
• look @ flashcards