The population mean GPA of all CLU students is 3.15 and the population variance is .55. A sample of 50 students is collected. Use this information to answer the following five questions. What is the standard deviation of the sample mean

The standard deviation of the sample mean

Step-by-step explanation:

We are provided with just a question; so, we are going to do just that.

Given that:

The population Mean = 3.15

The population variance = 0.55

The sample size n = 50

We can calculate the Standard deviation of the sample mean by using the formula:

Recall that:

The population variance = 0.55

So;

Then:

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

step-by-step explanation: