Or a population, N = 10,000, μ = 121, and σ = 21. Find to 2 decimal places the z value for

x¯=112.35
for n = 49

The value of z is -2.88 and this can be determined by using the formula of the z-score and also by using the given data.

Given :

To determine the value of z the below formula can be used:

Now, substitute the values of all known terms in the above formula in order to determine the value of 'z'.

Now, simplify the above expression.

z = -2.883333

Given in the problem that the value of 'z' should be rounded up to two decimal places that is:

z = -2.88

For more information, refer to the link given below:

link

The z value is - 2.88

Step-by-step explanation:

The formula of the z-score of a population is z = (x¯ - μ)/(σ/)

The given in the problem is:

Let us substitute all of these values in the rule above

Simplify up and down

z = - 2.883333

Round it to 2 decimal places

∴ z = - 2.88

The z value is - 2.88

the answer is c. 23/3