WLA-maths-aqa core maths- A1- 24

Select an advantage of cluster sampling

• can show regional variation

• free from bias

• considers proportions of responses

what is a census?

• part of a population is sampled

• every member of a population is sampled

• groups of a population are sampled

What is an advantage of the mean.

• uses every item of data

• is always a good representation of average

• not effected by extreme values

what does the range measure?

• the middle 50% of the data

• the spread of the data

• the average of a set of data

Calculate the mean and standard deviation of the following data set.

3, 5, 6, 9, 11, 12,17

• mean 10 s.d. 4.5

• mean 9 s.d. 5

• mean 9 s.d. 4.8

• mean 10 s.d. 4.2

What is the definition of simple interest?

• the measure of cash coming in and going out.

• the amount paid only on the original amount invested or borrowed.

• is the amount earned on savings or the amount od money added to a loan.

• the amount paid on the total amount when the interest is calculated.

What is the definition of compound interest?

• the measure of cash coming in and going out.

• the amount paid only on the original amount invested or borrowed.

• is the amount earned on savings or the amount of money added to a loan.

• the amount paid on the total amount when the interest is calculated.

What is AER

• is the weekly interest rate on savings

• is the yearly interest rate on savings

• is the monthly interest rate on savings

• is the daily interest rate on savings

work out the total simple interest for £500 invested for 4 years at 3%.

• £562.75

• £60

• £560

• £62.75

Work out the amount accumulated when £600 is invested for 5 years at a 4% compound interest rate.

• £729.99

• £129.99

• £120

• £720