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2 years ago

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Mathematics

1 answer:

Brrunno [24]2 years ago

4 0

Here is the answer (look at the photo)

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How do i do this? very confused

dusya [7]

Answer:

x=-1

Step-by-step explanation:

since XY is a straight line, XM = MY

so, 5x+8=9x+12

4x=-4

x=-1

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3 years ago

Read 2 more answers

I don’t understand this at all helppp

Fynjy0 [20]

Answer:

I don’t think it’s a right triangle

Step-by-step explanation:

5^2 + 8^2 should equal 12^2 for it to be a right triangle.

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3 years ago

A sample of 1500 computer chips revealed that 37% of the chips fail in the first 1000 hours of their use. The company's promotio

andreyandreev [35.5K]

Answer:

$z=\frac{0.37 -0.39}{\sqrt{\frac{0.39(1-0.39)}{1500}}}=-1.59$

Step-by-step explanation:

Data given and notation

n=1500 represent the random sample taken

$\hat p=0.37$ estimated proportion of of chips fail in the first 100 hours

$p_o=0.39$ is the value that we want to test

$\alpha$ represent the significance level

z would represent the statistic (variable of interest)

$p_v$ represent the p value (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the actual percentage that fail is different from the stated percentage. Find the value of the test statistic.:

Null hypothesis: $p=0.39$

Alternative hypothesis: $p \neq 0.39$

When we conduct a proportion test we need to use the z statisitc, and the is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

The One-Sample Proportion Test is used to assess whether a population proportion $\hat p$ is significantly different from a hypothesized value $p_o$ .