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Height of 20 students, in $$\mathrm{cm}$$ is given below
$$\begin{array}{llll}{143} & {160} & {154} & {159} & {172} & {165} & {162} & {171} & {146} & {165} \\ {176} & {145} & {165} & {182} & {175} & {186} & {160} & {158} & {167} & {172}\end{array}$$

a) Display the data in a stem-leaf plot.
b) Find the range of height.
c) What is the mean height?
d) What is the median height?
e) What percent of students having height greater than 175 $$\mathrm{cm} ?$$

(b) range $$=186-143=43 \mathrm{cm}$$

(c) mean $$=164.15 \ \mathrm{cm}$$

$$\frac{5 + 5}{2}=5$$

(d) Median $$=165 \ \mathrm{cm}$$

(e) $$\frac{3}{20}=15 \%$$

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