find range and mean 92,94,97,98,99,91,95
answer is 8, 95,142
Answers
Step-by-step explanation:
First thing we need tio do is to put the data in increasing order. This is needed to calculate the median:
92,94,97,98,99,91,95
Now we can calculate the parameters of this set:
Mean:
¯x=92,94,97,98,99,91,95=8
Median
To calculate the median we need to take "middle" elements in an ordered set. If the set has an odd number of elements, then there is only one middle element, otherwise there are 2 such elements and median is the mean of those elements.
To find the middle elements we can cross out elements at both ends of the set until only 1 or 2 remain uncrossed:
92,94,97,98,99,91,95
92,94,97,98,99,91,95
92,94,97,98,99,91,95
92,94,97,98,99,91,95
There are 2 uncrossed elements, so their mean is the median: Me=34+352= 95, 142
Answer:
Range = subtract the lowest number from highest number.
Range =99-91=8.
Mean = add all the given numbers and divide by the number of elements(7).
Mean=666/7
Mean=95( don't take the decimal numbers)
Hence, range and mean are verified.