Posted by **Jaime** on Saturday, January 17, 2009 at 7:51pm.

X = 7 and SX2 = 21. A new variable Y is created by multiplying each X by 3. What are SY and SY2 equal to ?

I do not understand.

- Statistics -
**drwls**, Sunday, January 18, 2009 at 8:03am
I am unfamiliar with your notation. Is X supposed to be the mean of a set of X's? In that case you should have called it X with a bar under it or Xmean. Is SX2 the variance of the set of X's? If you triple all the X's to get a set Y, The new Ymean is triple the value of Xmean, and SY2 becomes 9 SX2 = 189

## Answer this Question

## Related Questions

- psychology - dr. gibson has created a new energy drink which he hopes will also ...
- psychology - dr. gibson has created a new energy drink which he hopes will also ...
- math - someone please help me understand how this is done.state all the ...
- Statistics - 1. In thinking about doing statistical analysis, the sample mean ...
- Ratios and proportions - RATIOS AND PROPORTIONS x 3 - = - 4 2 The boards don't ...
- statistics - In a correlation study, we seek to determine; *if the IV cause an ...
- Statistics (binomial random variable) - Let x be a binomial random variable with...
- computer sceince - ƒnDefine a new class Coordinator that represent a faculty ...
- math - Define a new class Assistant that represent a faculty member who works a ...
- math(statistics) - suppose a random variable X can equal to 1,2,3,4,or 5. if P(x...

More Related Questions