A Level Maths Statistics Year 1 Chapter 2: Mini test

A mode will always exist

• FALSE
• TRUE

Which does not refer to the standard deviation

• The average amount each data point differs from the mean
• Square root of variance
• Measure of spread
• 

Which is not a measure of spread

• range
• standard deviation
• interquartile range
• median

Data points x are coded using y=2x+3. From x, mean of 13 will become...

• 5
• no change
• 26
• 29

Data points x are coded using y=2x+3. The new standard deviation will be...

• no change
• ×√2 bigger
• ×2 bigger
• ×2² bigger

Interpolation to find the median...

• is a lot of fun
• is too long for kahoot
• not accurate
• c.f. > find interval > find distance into interval > add to start of int.