Mathematics: What are the mean, median, mode and range of the data set givem the altitude of lakes in feet -12 -9 -14 -39 -49 -18 and -43

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What are the mean, median, mode and range of

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11.01.2022

QUESTION 1

The given data set is

-12 -9 -14 -39 -49 -18, -43

The mean is given by:

$\bar X =\frac{\sum x}{n}$

$\bar X =\frac{-12+-9+-14+-39+-49+-18+-43}{7}$

$\bar X =-\frac{184}{7}$

QUESTION 2

The median is the middle number after arranging the numbers in order.

Let us arrange in ascending order.

-49,-43,39,-18,-14,-12,-9

Hence the median is -18

QUESTION 3

The mode of the data set is the most occurring number.

All the numbers occurs once.

The data set has no mode.

QUESTION 4.

The range is the highest value - the least value.

-9--49=40

The range is 40

NB: The negative values means the object is below the horizon.

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