A subset chosen to represent the population

Which statement about correlation is correct?

Correlation does not imply causation

What is the interquartile range?

upper quartile minus lower quartile

minimum, lower quartile, median, upper quartile, maximum

an average and a measure of spread

16questions. Pick an answer and you'll see why right away.

What is a sample?
Which sampling method gives every member an equal chance of selection?
The number of cars in a car park is which type of data?
Find the mean of $3, 8, 5, 8, 6$ .
What is the median of $2, 9, 4, 7, 5$ ?
Estimate the mean from grouped data: midpoints $10, 20, 30$ with frequencies $3, 4, 3$ .
A pie chart represents $90$ people. What angle does a category of $30$ people take?
On a histogram with unequal class widths, what does the bar height represent?
A histogram class of width $4$ has frequency density $6$ . What is the frequency?
Points on a scatter graph rise from bottom-left to top-right. What is the correlation?
Estimating a value beyond the range of the data on a line of best fit is called what?
Which statement about correlation is correct?
On a cumulative frequency curve for $n = 80$ , at what cumulative frequency is the median read?
What is the interquartile range?
A box plot shows which five values?
To compare two distributions fully, you should contrast which two things?