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3 years ago

Part A: are they all right?

Mathematics

1 answer:

kipiarov [429]3 years ago

4 0

Answer:

yes all are corect

Step-by-step explanation:

I know becuse i did this before.

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The system of equations is given:

Ainat [17]

Answer:

Step-by-step explanation:

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3 years ago

A courier service company wishes to estimate the proportion of people in various states that will use its services. Suppose the

Rasek [7]

Answer:

$\mu_{p} = p = 0.06$

And the standard error is given by:

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

And replacing we got:

$SE_[p]= \sqrt{\frac{0.06*(1-0.06)}{373}}= 0.0123$

And we want to find this probability:

$P(\hat p < 0.03)$

We can calculate the z score for this case and we got:

$z = \frac{\hat p -\mu_p}{\Se_p} = \frac{0.03-0.06}{0.0123}= -2.440$

And using the normal distribution table or excel we got:

$P(\hat p < 0.03)= P(Z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

Solution to the problem

For this case we can find the mean and standard error for the sample proportion with these formulas:

$\mu_{p} = p = 0.06$

And the standard error is given by:

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

And replacing we got:

$SE_[p]= \sqrt{\frac{0.06*(1-0.06)}{373}}= 0.0123$

And we want to find this probability:

$P(\hat p < 0.03)$

We can calculate the z score for this case and we got:

$z = \frac{\hat p -\mu_p}{\SE_p} = \frac{0.03-0.06}{0.0123}= -2.440$

And using the normal distribution table or excel we got:

$P(\hat p < 0.03)= P(Z$

8 0

4 years ago

The area of David's living room is 18.087 square yards, and their bedroom has an area of 15.78 square yards.Round to the nearest

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Q. The area of David's living room is 18.087 square yards, and their bedroom has an area of 15.78 square yards.Round to the nearest tenth and estimate the amount of carpet they need to buy. PLZ HELP!!

A. 33.867 and rounded is 33.9

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3 years ago

Lisa is 100 yards away from tim and lisa can run to tim in 18 sec

ladessa [460]

Lisa runs approximately 5 and 5 / 9 yards per second.

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3 years ago

The base parking at a mall on a Sunday is $2 per hour. If a vehicle is parked for 4 hours, only $6 is charged. What percentage i

Dimas [21]

$2=1 hour
$8=4 hours
She paid $6, so the amount save $8-$6=$2
2/8×100=25%

4 0

4 years ago

Read 2 more answers