Thursday

July 24, 2014

July 24, 2014

Posted by **abc** on Sunday, March 16, 2014 at 8:27am.

P(X>0.75)=

P(X≤−1.25)=

Let Z=(Y−3)/4. Find the mean and the variance of Z.

E[Z]=

var(Z)=

P(−1≤Y≤2)=

- Math (Partial) -
**PsyDAG**, Sunday, March 16, 2014 at 8:27pmFirst two questions and last.

Z = (score-mean)/SD

SD^2 = variance

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability of the Z score.

- Math -
**abc**, Monday, March 17, 2014 at 4:47pmP(X>0.75)= 0.2266

P(X≤−1.25)= 0.1056

Can't figure out these:

E[Z]=

var(Z)=

P(−1≤Y≤2)=

anyone?

- Math -
**Bane Havoc**, Tuesday, March 18, 2014 at 4:13pmP(X>0.75)= 0.2266

P(X≤−1.25)= 0.1056

E[Z]= -1/4

var(Z)= 9/16

P(−1≤Y≤2)= ?

**Related Questions**

random variables - For the standard normal random variable Z, compute the ...

Statistics - Using the standard normal distribution tables, the area under the ...

Math - Random variables X and Y are both normally distributed with mean 100 and ...

MATH - Which of the following normal distributions has the smallest spread? A. A...

math 115 - Let x be a continuous random variable that follows a normal ...

statistics - 1)Please Help In testing whether the means of two normal ...

Stats - Give the numerical value for each of the following descriptions ...

random variables - For the standard normal random variable Z, compute the ...

prob and stats - The tread lives of the Super Titan radial tires under normal ...

statistics - Q. The MBA department is concerned that dual degree students may be...