21M.1.SL.TZ1.2

pestleMathematicsAISLPaper 121M· sl-4-3-mean-median-mode-mean-of-grouped-data-standard-deviation-quartiles-iqrsource ↗

Deb used a thermometer to record the maximum daily temperature over ten consecutive days. Her results, in degrees Celsius ( $° C$ ), are shown below.

$14, 15, 14, 11, 10, 9, 14, 15, 16, 13$

For this data set, find the value of

the mode.

[1]

the mean.

[2]

the standard deviation.

[1]

Markscheme / solution

$14$ A1

[1 mark]

$\frac{14 + 15 + \dots}{10}$ (M1)

$= 13.1$ A1

[2 marks]

$2.21 (2.21133 \dots)$ A1

[1 mark]

Examiners’ report

[N/A]