3 years ago

Is it true that Confidence intervals are always close to their true population values?

1 answer:

6 0

Answer:

This means that there is a 95% probability that the confidence interval will contain the true population mean. Thus, P( [sample mean] - margin of error < μ < [sample mean] + margin of error) = 0.95.

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Kerry has a new phone plan. It works by charging $20 per month and then $0.10 for each minute over 200 minutes.

REY [17]

Answer:

(40-20)/.10

Step-by-step explanation:

40-20 is 20, 20 divided by .10 is 200, she used 200 extra minutes.

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3 years ago

Someone please help me

lutik1710 [3]

Answer:

Step-by-step explanation:

I did that in my head could be wrong

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3 years ago

A pecan pie is being served for dessert. One piece of pie has an arc length of 7.85 in. It has been cut into 8 equal pieces. Wha

pishuonlain [190]

Answer: 10 inches.

Step-by-step explanation:

Since the pecan pie is a circle, you can use this formula:

$arc\ length=r\theta$

Where "r" is the radius and $\theta$ is the central angle of the arc in radians.

If the pecan pie has been cut into 8 equal pieces then the central angle is:

$\theta=\frac{2\pi}{8}\\\\\theta={\frac{\pi}{4}$

Now you know the arc length and the central angle, then, you can solve for "r" from $arc\ length=r\theta$ :

$\frac{arc\ length}{\theta} =r$

Substituting values, you get that the radius of the pecan pie rounded to the nearest whole number is:

$r=\frac{7.85in}{\frac{\pi}{4}}\\\\r=10in$

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3 years ago

Spiral Review A parking garage charges the rates shown. First hour Each hour after the first hour $12.50 $8.75 per hour Write an

lyudmila [28]

I believe it would be 12.50+8.75x=47.50

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3 years ago

The triangular park shown below is going to be surrounded by a fence the dimensions of the park are given in feet. How many feet

Ksenya-84 [330]

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its 65

Step-by-step explanation:

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