Draw a stem-and-leaf plot $($and key$)$ for the given data sets.

$61, 72, 64, 70, 79, 83, 64, 61, 80, 65, 73, 79$.

Draw a stem-and-leaf plot $($and key$)$ for the given data sets.

$3.4, 5.1, 4.7, 5.5, 3.0, 3.9, 4.1, 5.5, 4.6, 4.9, 6.8$.

Draw a stem-and-leaf plot $($and key$)$ for the given data sets.

$$\begin{gathered} 1210, 1350, 1270, 1390, 1280, 1400, 1360, \\ 1260, 1350, 1200, 1410, 1560, 1200 \end{gathered}$$

Find the measure of central tendency for the data sets. Show your working and give answers to the nearest tenth where necessary.

$61, 72, 64, 70, 79, 83, 64, 61, 80, 65, 73, 79$.

Find the range, quartiles and interquartile range for the data set.

$61, 72, 64, 70, 79, 83, 64, 61, 80, 65, 73, 79$.

Literacy rates can be measure of the quality of the educational system in a country. Data for the $15$ high-income countries and $15$ low-income countries with the lowest literacy rates are summarised below.

Represent each set of data using a box-and-whisker plot.Draw both plots on the same axis.

Literacy rates can be measure of the quality of the educational system in a country. Data for the $15$ high-income countries and $15$ low-income countries with the lowest literacy rates are summarised below.

Can you tell whether or not there is an unequal access to education in low and high-income countries?Which group seems to have better access?Use your representations to support your conclusion.

Students in high and low-income countries attend school for a specified number of days per year, as represented below.

Convert the data to a stem-and-leaf plot as well as a box-and-whisker plot.

Students in high and low-income countries attend school for a specified number of days per year, as represented below.

What are the advantages and disadvantages of each of the three representations?Explain.