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

idk

step-by-step explanation:

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.