Given the altitude of lakes in feet: –12, –9, –14, –39, –49, –49, –18, –43, find the mean, median, mode, and range

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

Mean: Add the numbers and divide by 8

Median: The middle number. Since there's an even number, take the average of the middle two numbers

Mode: The number that appears the most

Range: 49 - 9 = ?

The answer is...

D - or...
mean= 29.1, median= 28.5, mode= -49, range= 40

Mrs. sue is correct about how to find these numbers.

To find the mean, median, mode, and range of the given altitude of lakes in feet, follow these steps:

1. Mean:
The mean is the average value of the dataset. To find the mean, sum up all the values and divide the sum by the total number of values.

Calculate the sum of all the altitudes:
-12 + (-9) + (-14) + (-39) + (-49) + (-49) + (-18) + (-43)
= -233

Divide the sum by the total number of values (8):
-233 / 8
= -29.125

The mean altitude of the lakes is -29.125 feet.

2. Median:
The median is the middle value in an ordered dataset. First, arrange the altitudes in ascending or descending order:

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

There are 8 altitudes, so the middle value is the average of the two center values: -39 and -18.
Median = (-39 + -18) / 2
Median = -57 / 2
Median = -28.5

The median altitude of the lakes is -28.5 feet.

3. Mode:
The mode is the value that appears most frequently in the dataset. In this case, there are two modes: -49.

The mode altitude of the lakes is -49 feet.

4. Range:
The range is the difference between the highest and lowest values in the dataset. To find the range, subtract the lowest value from the highest value:

Highest value: -9
Lowest value: -49

Range = -9 - (-49)
Range = -9 + 49
Range = 40

The range of altitudes for the lakes is 40 feet.

**ANSWER: A mean = –28.5, median = –29.1, mode = –49, range = 40

First put them in order:
- 49, - 49 , - 43 , -39 , -18, -14, -12, -9
Add the two middle numbers -39 and -18, it equals -57
Divide - 57 and 2, it equals - 28.5 <--- MEAN

Second add all the numbers together, it equals - 233, then divide by 8, which equals
- 29.1 <---MEDIAN

MODE is the number that happens most, which is -49 <--- MODE

The range is -49 - ( -9 ) = - 40 <-----RANGE