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3 years ago

Pa help huhu need lngs mga lods

Mathematics

1 answer:

Svet_ta [14]3 years ago

5 0

Answer:

lol

Step-by-step explanation:

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Diving simply the following: 3 power 12÷3 power 7

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${3}^{12} \div {3}^{7} =$

${3}^{12} \times {3}^{ - 7} =$

${3}^{12 - 7} = {3}^{5}$

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3 years ago

An ordinance requiring that a smoke detector be installed in all previously constructed houses has been in effect in a particula

bonufazy [111]

Answer:

a. P=0.01222

b. P=0.98778

c. The probability of rejecting the claim is now P=0.00298.

Step-by-step explanation:

In this case, we evaluate the sampling distribution for a population proportion π=0.8 with a sample size of 25.

We need to calculate the probability of getting a sample mean below 15, which means p=15/25=0.6.

The standard deviation of the sampling distribution is:

$\sigma_M=\sqrt{\frac{\pi(1-\pi)}{N}} =\sqrt{\frac{0.8\cdot0.2}{25}} =\sqrt{\frac{0.16}{25} } =0.08$

The z value por p=0.6 is

$z=\frac{p-\pi+0.5/N}{\sigma} =\frac{0.6-0.8+0.5/25}{0.08}= \frac{-0.18}{0.08} =-2.25$

The probability of having a sample mean less than 15 is

$P(\bar X$

The probaiblity of not rejecting the claim is 1-0.01222=0.98778

If the value 15 is replaced by 14, we have a new value of p=14/25=0.56.

There will be less chances of rejecting the hypothesis.

$z=\frac{p-\pi+0.5/N}{\sigma} =\frac{0.56-0.8+0.5/25}{0.08}= \frac{-0.22}{0.08} =-2.75$

$P(\bar X$

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3 years ago

Pa help huhu need lngs mga lods​

Pa help huhu need lngs mga lods