The correct answer would be D. You find the range by subtracting the lowest value of a data set from the highest value of the data set.
The standard deviation using the range rule of thumb of a data set with a minimum value of 176 and a maximum value of 237 is:
15.3
We know that the range rule of thumb is used to find the estimate of the standard deviation with the help of the range of a data set.
It states that the standard deviation of a data set is equal to 1/4 times the range of a data set.
We have the minimum value of set= 176
and maximum value of set=237
Hence, the Range of data set= maximum value-minimum value
= 237-176
= 61
Hence, we have the standard deviation as:
Hence, the answer is:
Answer:
30 and 42
Hope this helps
Answer to first four-
first one- 2f+2f=60
4f=60
f=15
second one-18+2d=38
2d=20
d=10
(short side is 9)
third one-2a+a+5+a+5=26
4a+10=26
a=4
long side is 9
short side is 8
fourth one-3xy+3xy+xy=63
7xy=63
xy=9
long side is 27