Is 20 an independent or dependent variable

Mathematics

2 answers:

seropon [69]3 years ago

6 0

Independent. Dependent variable would be an unknown usually shown with a letter (x,y,z).

kirill115 [55]3 years ago

5 0

Independent. A dependent variable would be a letter or symbol that needs a letter or key to be solved.

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Suppose that scores on a knowledge test are normally distributed with a mean of 60 anda standard deviation of 4.3. Scores on an

Iteru [2.4K]

The Z-score for Boris is 1.627, and the Z-score value for the Callie is 1.267, Boris scored higher relatively.

The Z test is a parametric procedure that is used on data that is dispersed in a normal fashion. For testing hypotheses, the z test can be used on one sample, two samples, or proportions. When the population variance is known, it analyzes if the means of two big groups are dissimilar.

We know the formula for the Z-test:

$\rm Z = \dfrac{X-\mu}{\sigma}$

(a) For Boris:

$\rm Z = \dfrac{67-60}{4.3}$

Z = 1.627

(b) For Callie:

$\rm Z = \dfrac{119-110}{7.1}$

Z = 1.267

(c) Since the measures of two different data have been set to one measure and the value of the Z-score for Boris is higher relative to the Z-score value of Callie so Boris scored higher relatively.

Thus, the Z-score for Boris is 1.627, and the Z-score value for the Callie is 1.267, Boris scored higher relatively.

Learn more about the Z-test here:

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8 0

2 years ago

IDENTIFY THE COORDINATES OF THE POINT

Musya8 [376]

Answer:

a) (-3, -7)

Step-by-step explanation:

a) (-3, -7)