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3 years ago

PLEASE HELP AGAIN LOL WHAT IS 4(2x+1)-3

Mathematics

2 answers:

Harman [31]3 years ago

7 0

Answer:

8x + 1

Step-by-step explanation:

8x + 4 -3

AURORKA [14]3 years ago

4 0

Answer:

8x+1

Step-by-step explanation:

I dunno why my answer has to be at least 20 characters

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3 years ago

Read 2 more answers

3. Suppose you are testing H0 : µ = 20 vs H1 : µ > 20. The sample is large (n = 71) and the variance, σ 2 , is known. (a) Fin

LUCKY_DIMON [66]

Answer:

We reject the null hypothesis.

Step-by-step explanation:

We are given the following information in the question:

Sample size, n = 71

Population variance is known.

Level of significance, α = 0.08

$z_{\text{stat}} = 1.56$

The null and alternate hypothesis are:

$H_{0}: \mu = 20\\H_A: \mu > 20$

We use one-tailed z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} } = 1.56$

Now, $z_{critical} \text{ at 0.08 level of significance } = 1.41$

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$z_{stat} > z_{critical}$

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3 years ago