The mean and range of a set of numbers 0.80,0.80,0.90,1.00,1.10,1.20,1.20,1.40 are m + r respectively,find m + r?

Find the mean first = sum of scores/number of scores.

Range = highest score - lowest

Add the two values.

1.65

m=1.05, r=0.6

m+r= 1.66

To find the mean and range, follow these steps:

Mean:
1. Add up all the numbers in the set: 0.80 + 0.80 + 0.90 + 1.00 + 1.10 + 1.20 + 1.20 + 1.40 = 8.40.
2. Divide the sum by the total number of numbers in the set: 8.40 / 8 = 1.05.

Range:
1. Arrange the numbers in ascending order: 0.80, 0.80, 0.90, 1.00, 1.10, 1.20, 1.20, 1.40.
2. Subtract the smallest number from the largest number in the set: 1.40 - 0.80 = 0.60.

Therefore, the mean (m) is 1.05 and the range (r) is 0.60. To find m + r, add these two values together:
m + r = 1.05 + 0.60 = 1.65.