Question

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

Answer 1

QUESTION 1

The given data set is

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

The mean is given by:

`\bar X =(\sum x)/(n)`

`\bar X =(-12+-9+-14+-39+-49+-18+-43)/(7)`

`\bar X =-(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.