Given weights 3.0, 3.0, 3.5 and 2.5, what is the mean? (Multiple choice)

Question

The answer choices are:

A) 3.0 plus or minus 0

B) 3.0 plus or minus 0.25

C) 3.0 plus or minus 0.5

 

Please explain! Thank you so much in advance!

Answer 1

∑X=3.0+3.0+3.5+2.5=12.0

n=4 



average = mean = ∑X/n = 12.0/4=3.0



The range of the weights is + or - 0.5g from the mean



the answer is choice C

Answer 2

mean = average

 

average = add all the number together and divide by the total number you added

 

 

3+3+3.5+2.5 = 12 when adding four numbers

 

 average = 12/4 = 3

 

answer is A

 

 

Answer 3

Hi Runner, to find the mean, sum the weights and then divide by the number of weights.

 

Sum of weights: 3.0 + 3.0 + 3.5 + 2.5 = 12

 

Number of weights: 4

 

Mean = 12 / 4 = 3.0

 

Answer: A, 3.0 plus or minus 0.

 

Questions?