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RideAnS [48]
2 years ago
9

Identify the null and alternative hypothesis in the following scenario. To determine if battery 1 lasts longer than battery 2, t

he mean lasting times, of the two competing batteries are compared. Twenty batteries of each type are randomly sampled and tested. Both populations have normal distributions with known standard deviations Select the correct answer below
Mathematics
1 answer:
Agata [3.3K]2 years ago
8 0

Answer:

H₀: μ ≤ μ  H₁: μ > μ

Step-by-step explanation:

Hello!

If battery 1 lasts longer than battery 2, and all the batteries of population 1 and population 2 are built using the same method, then you could say that the population mean of the lifespans of batteries 1 are longer than the lifespan of batteries 2. Symbolically: μ₁ > μ₂

This would be your alternative hypothesis.

The null hypothesis is:

H₀: μ₁ ≤ μ₂

Then the correct answer is number 5

Looked for exercise's Options

H₀: μ ≥ μ H₁: μ < μ

H₀: μ ≤ -μ  H₁: μ > -μ

H₀: μ ≥ -μ  H₁: μ < -μ

H₀: μ = μ  H₁: μ ≠ μ

H₀: μ ≤ μ  H₁: μ > μ

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Two numbers have difference of 0.7 and a sum of 1. What are the numbers?
algol [13]
We can solve this by setting up 2 equations. We can use any letters like. For now, I'll use x and y.
So now we know that    x - y = 0.7   and    x + y = 1.
Now we can eliminate one of the letters by adding or subtracting one equation from the other. I am going to eliminate y by adding the two together (the y and the -y cancel).
This gives us   2x = 1.7,    and so x = 1.7 ÷ 2 = 0.85
Finally, we can substitute x for 0.85 back into one of the original equations to figure out what y equals. I'm going to use   x + y = 1.
So now we have    0.85 + y = 1,    so y = 1 - 0.85 = 0.15

The numbers, therefore, are 0.85 and 0.15 (you can check by using the other equation).

Hope this helps!
4 0
2 years ago
Jona and his friend go apple picking .jonah fills 5 basket.each basket holds 15apples . If 4 of jonah's friend pick the same amo
k0ka [10]
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5 0
3 years ago
Read 2 more answers
This is for a grade,Please help me out as much as you can!!!
kolbaska11 [484]

Answer:

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Step-by-step explanation:

5 0
2 years ago
Select the correct answer.
Anastaziya [24]

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Step-by-step explanation:

8 0
3 years ago
A rectangular prism has a top face with an area of 20 ft2 and a height of 5 ft. What is the volume of this rectangular prism? Th
kkurt [141]

Answer:

the volume of the rectangular prism is 100 ft³  

Step-by-step explanation:

Given;

area of top face of a rectangular prism, A = 20 ft²

height of the rectangular prism, h = 5 ft

Volume of the rectangular prism =  Area of top face x height of the rectangular prism

Volume of the rectangular prism = A x h

Volume of the rectangular prism = 20 ft² x  5 ft

                                                       = 100 ft³

Therefore, the volume of the rectangular prism is 100 ft³                                      

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