3 years ago

If you answer these questions correctly with an explanation you can get Brainliest

Mathematics

2 answers:

Rina8888 [55]3 years ago

4 0

Not sure sorry I will look at it again though

Tanya [424]3 years ago

3 0

I’m not sure either but I’ll try and look it up

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Suppose you are testing the null hypothesis that a population mean is less than or equal to 46, against the alternative hypothes

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Answer:

Option A) 2.5

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 46

Sample mean, $\bar{x}$ = 50

Sample size, n = 25

Alpha, α = 0.05

Population standard deviation, σ = 8

First, we design the null and the alternate hypothesis

$H_{0}: \mu \leq 46\\H_A: \mu > 46$

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{50 - 46}{\frac{8}{\sqrt{25}} } =2.5$

Option A) 2.5

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