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3 years ago

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Polygons consist of line segments connected only at their endpoints. Many types of polygons exist, with varying side and angle m

easurements. Summarize how we can find the sum of the interior angles of a polygon.

1 answer:

aleksley [76]3 years ago

8 0

Answer:

its asking for your opinion

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You are studying the water properties of a bog in eastern Wisconsin and wish to estimate its acidity. You de ne a grid that cove

GenaCL600 [577]

Answer:

$4.8-1.453\frac{1.3}{\sqrt{82}}=4.591$

$4.8+1.453\frac{1.3}{\sqrt{82}}=5.009$

So on this case the 85% confidence interval would be given by (4.591;5.009)

And we can conclude that the true mean for the acidity at 85% of confidence is between (4.591;5.009)

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=82-1=81$

Since the Confidence is 0.85 or 85%, the value of $\alpha=0.15$ and $\alpha/2 =0.075$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.075,81)".And we see that $t_{\alpha/2}=1.453$

Now we have everything in order to replace into formula (1):

$4.8-1.453\frac{1.3}{\sqrt{82}}=4.591$

$4.8+1.453\frac{1.3}{\sqrt{82}}=5.009$

So on this case the 85% confidence interval would be given by (4.591;5.009)

And we can conclude that the true mean for the acidity at 85% of confidence is between (4.591;5.009)

6 0

4 years ago

Read 2 more answers

HELPPGPGPPHPHGPPFPSLLSLSL

ololo11 [35]

If Carla would have bought 4 plants it would have been 13 dollars from green touch

If she would have bought them for the grocery store it would have been 14 dollars

So in conclusion she saved 1 dollar
Option 3

8 0

3 years ago

I'll mark brainliest thanks

Alecsey [184]

Answer:

Transitive

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Solve and graph and plot this on the line

alexira [117]

X less than or equal to (< with the line underneath) -3 or x>0

7 0

3 years ago

I don't get this problem

DerKrebs [107]

Answer:

22.2%

Step-by-step explanation:

Probability is the chance of an event happening, it can be found by using the following formula,

$\frac{desired}{total}$

Where the word (desired) represents the outcomes one wants, and (total) represents the total number of outcomes.

In this case, one is asked to find the probability of the sum of two numbers the results from rolling two dice, not being a multiple of (3) or (2). In this case, it is easier to list out the number of numbers between (1) and (12) that are not a multiple of three or two. Please note, the largest sum of number one can get when rolling two dice is (12), since the largest value on a dice is (6), and (6+6) equals (12).

Not multiples of (3) or (2):

1, 5, 7, 11

There are (4) numbers that are not multiples of (2) or (3). This means that there are (8) multiples of (2) or (3) between the numbers of (1) and (12), since (12 - 4 = 8)

The total number of outcomes is the following:

$6^2=36$

This is because there are (6) sides on a die, the number of outcomes is equal to (6) times (6), thus ( $6^2$ ) or ( $36$ ).

Now set up the probability equation:

$\frac{desired}{total}$

Substituted,

$\frac{8}{36}$

Write as a decimal:

0.222

As a percent:

22.2%

6 0

3 years ago