Question

A stemplot of ages of 18 faculty members in a college math department follows. 4|3 represents 43 years.

3 2 4 8 9 9
4 0 3 5 6 9
5 3 4 7 8 9 9
6 3 8
Reference: Ref 2-2

The standard deviation for ages of these faculty members is 10.62 years. Five years from now, assuming the same people remain, the standard deviation will be
A. 53.1 years.
B. 15.62 years.
C. 10.62 years.
D. none of the above; we can't calculate it from the information provided.

Answer 1

You would think it would stay the same, though I'm not 100% sure....

Answer 2

if not I'll go try and calculate it, I wanted to see if maybe this was correct....

Answer 3

You're adding 5 to each number (since everyone ages 5 years)

Answer 4

Think of the distribution (as a histogram) and think of shifting everything 5 units to the right

Answer 5

Does that shape change?

Answer 6

so it could be the same or 5 above... 15.62...

Answer 7

nop

Answer 8

Does the way it's spread out change?

Answer 9

nope

Answer 10

so it should stray the saame.

Answer 11

So the standard deviation remains the same

Answer 12

Thought so thanks....

Answer 13

So write out the list of numbers. Then find the standard deviation.

Answer 14

oh they already did it for you or they gave it to you, nvm

Answer 15

yeah :)

Answer 16

http://openstudy.com/users/konradzuse#/updates/504a72b7e4b0b72c4ea89cc0 any idea on this one?