SQA National 5 Applications of Mathematics Statistics quiz quiz

In a pie chart, a sector is $\tfrac{1}{4}$ of the total. What is its angle?

A pie chart sector measures $72^\circ$. What fraction of the total is it?

A stem-and-leaf row $6 \mid 2\;7$ (tens and units) represents which values?

Find the mean of $6, 8, 10, 12$.

Find the median of $3, 7, 8, 10, 14, 15, 19$.

Find the mode of $4, 5, 5, 7, 9, 5, 11$.

The interquartile range $Q_3 - Q_1$ is $16$. What is the semi-interquartile range?

For $Q_1 = 5$ and $Q_3 = 17$, find the semi-interquartile range.

The standard deviation formula at National 5 divides the sum of squared deviations by:

Two data sets have the same mean. Set A has standard deviation $3$ and Set B has $8$. Which is more consistent?

Points on a scattergraph fall from upper left to lower right. This shows:

A line of best fit is $y = 2x + 5$. Estimate $y$ when $x = 4$.

A line of best fit passes through $(0, 4)$ and $(5, 19)$. What is its gradient?

A bag has $3$ red and $7$ green counters. What is the probability of red?

The probability of rain is $0.3$. What is the probability of no rain?

$P(\text{win}) = 0.2$ and a game is played $40$ times. What is the expected number of wins?