Consider the ages of 5 brothers: 32, 26, 28, 30, 28. Determine which of the following are true if a new brother is adopted at age 10.
A) The median will decrease
B) The mean will decrease
C) The range will increase
D) The standard deviation will decrease
Please explain how you find the answer to this.
sort the numbers
before: 26 28 28 30 32
after: 10 26 28 28 30 32
(B) (C) are true