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3 years ago

Jason has a piece of wire that is 62.4 inches long. He cuts

Mathematics

1 answer:

almond37 [142]3 years ago

6 0

Answer:

20.8 inches each

Step-by-step explanation:

62.4÷3=20.8

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I need help pls no wronge answers this is for a test

VashaNatasha [74]

Answer:

I think the answer is

Step-by-step explanation:

(D) OR (B)

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3 years ago

Suppose a consumer group suspects that the proportion of households that have three cell phones NOT known to be 30%. A cell phon

leva [86]

Answer:

We conclude that the actual percentage of households is equal to 30%.

Step-by-step explanation:

We are given that a consumer group suspects that the proportion of households that have three cell phones NOT known to be 30%.

Their marketing people survey 150 households with the result that 43 of the households have three cell phones.

Let p = proportion of households that have three cell phones NOT known.

So, Null Hypothesis, $H_0$ : p = 30% {means that the actual percentage of households is equal to 30%}

Alternate Hypothesis, $H_A$ : p $\neq$ 30% {means that the actual percentage of households different from 30%}

The test statistics that would be used here One-sample z-test for proportions;

T.S. = $\frac{\hat p-p}{\sqrt{\frac{p(1-p)}{n} } }$ ~ N(0,1)

where, $\hat p$ = sample proportion of households having three cell phones = $\frac{43}{150}$ = 0.29

n = sample of households = 150

So, the test statistics = $\frac{0.29-0.30}{\sqrt{\frac{0.30(1-0.30)}{150} } }$

= -0.27

The value of z test statistic is -0.27.

Also, P-value of the test statistics is given by;

P-value = P(Z < -0.27) = 1 - P(Z $\leq$ 0.27)

= 1 - 0.6064 = 0.3936

Now, at 1% significance level the z table gives critical value of -2.58 and 2.58 for two-tailed test.

Since our test statistic lies within the range of critical values of z, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which we fail to reject our null hypothesis.

Therefore, we conclude that the actual percentage of households is equal to 30%.

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3 years ago

Factor the following polynomial: 2x^2+8x

timama [110]

Look at the attached picture⤴

Hope it will help u..

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3 years ago

What is the mode of this problem

stiv31 [10]

The mode is 100 :)

To find the mode, you have to see which number appears the most.

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3 years ago

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What is equivalent to -2(x5)

anzhelika [568]

-10x is the final answer
Hope this helps

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3 years ago