3 years ago

Triangles ADE and ABC are similar. What is the value of

Mathematics

1 answer:

musickatia [10]3 years ago

4 0

Answer:

x=4

Step-by-step explanation:

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Explain how to perform a two-sample z-test for the difference between two population means using independent samples with sigma

Rom4ik [11]

Answer:

Step-by-step explanation:

In the two independent samples application, it involves the test of hypothesis that is the difference in population means, μ1 - μ2. The null hypothesis is always that there is no difference between groups with respect to means.

Null hypothesis: ∪₁ = ∪₂. where ∪₁ represent the mean of sample 1 and ∪₂ represent the mean of sample 2.

A researcher can hypothesize that the first mean is larger than the second (H1: μ1 > μ2 ), that the first mean is smaller than the second (H1: μ1 < μ2 ), or that the means are different (H1: μ1 ≠ μ2 ). These ae the alternative hypothesis.

Thus for the z test:

if n₁ > 30 and n₂ > 30

z = X₁ - X₂ / {Sp[√(1/n₁ + 1/n₂)]}

where Sp is √{ [(n₁-1)s₁² + (n₂-1)s₂²] / (n₁+n₂-2)}

5 0

3 years ago

-2<br> Find the slope of the line y = 3x -<br> X – 8.

lesantik [10]

Answer:

$y = 3x - x - 8 = y = 8x$