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PSYCHO15rus [73]
3 years ago
15

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

1 and sigma 2 known.
Mathematics
1 answer:
Rom4ik [11]3 years ago
5 0

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)}

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Step-by-step explanation:

A budget gets set to someone that has to spend within that amount. Example: If my budget is 20 dollars, I can only spend 20 dollars or less.

5 0
3 years ago
Question in attachment
Naya [18.7K]

Answer:

y = 3/4 x + 25/4

Step-by-step explanation:

just tried the numbers out with desmos (free online software

the 3/4 where guessedby intuition

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8 0
3 years ago
What is the surface area of the cube shown?<br><br> 6.5 lenth 6.5 hieght
swat32

Answer:

253.5

Step-by-step explanation:

basically i had the same question so yeah! and im a pro at math

6 0
3 years ago
Read 2 more answers
The area of a rectangular wall of a barn is 64 square feet. Its length is 8 feet longer than twice its width. Find the length an
ValentinkaMS [17]
L×w=64 ft^2...(1)
2w+8= l...(2)

l=64-w...(1a)

2w+8= 64-w
2w+w+8=64
3w=64-8
3w÷3= 56÷3
w=18.6'

l×w= 64
l×18.6= 64
l= 64÷18.6
l= 3.44 to the nearest hundredths.
6 0
3 years ago
Read 2 more answers
Evaluate 2 p-q when p=17 and q=3.
BigorU [14]

Final answer:

The value of the expression is 31.

Step-by-step explanation:

Substitution is a process of putting the values of variable in the expression.

Given: p=17 and q=3

To find: value of 2p-q

We will substitute the values and simplify.

Putting the values of variables in the expression as

2p-q = 2x17-3 =34-3 = 31

For more check here: brainly.com/textbook-solutions/q-2-evaluate-2-p-q-p-17-q-govvt8

4 0
2 years ago
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