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Stella [2.4K]
3 years ago
6

Find the Value of each variable in the parallelogram.​

Mathematics
1 answer:
Tpy6a [65]3 years ago
5 0

Answer:

a=28 b=87

Step-by-step explanation:

a-10=18 a=10+18 a=28 b+16=103 b=103-16 b=87

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The chamber of commerce of a Florida Gulf Coast community advertises that area residential property is available at a mean cost
Alja [10]

Answer:

a) In the step-by-step explanation.

b)  The null and alternative hypothesis are:

H_0: \mu=125000\\\\H_a:\mu> 125000

c) P-value = 0.015

d) The conclusion, at a level of significance of 0.05, is that there is enough evidence to support the claim that that area residential property is available at a mean cost significantly higher than $125,000 per lot.

e) The claim of the chamber of commerce is false. We have statistical evidence against that claim and we can conclude that the mean prices are significantly higher than $125,000.

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim, expressed in the alternative hypothesis, is that area residential property is available at a mean cost significantly higher than $125,000 per lot.

Then, the null and alternative hypothesis are:

H_0: \mu=125000\\\\H_a:\mu> 125000

The significance level is 0.05.

The sample has a size n=32.

The sample mean is M=130000.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=12500.

The estimated standard error of the mean is computed using the formula:

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{12500}{\sqrt{32}}=2209.71

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{130000-125000}{2209.71}=\dfrac{5000}{2209.71}=2.26

The degrees of freedom for this sample size are:

df=n-1=32-1=31

This test is a right-tailed test, with 31 degrees of freedom and t=2.26, so the P-value for this test is calculated as (using a t-table):

\text{P-value}=P(t>2.26)=0.015

As the P-value (0.015) is smaller than the significance level (0.05), the effect is  significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that that area residential property is available at a mean cost significantly higher than $125,000 per lot.

6 0
3 years ago
What is the answer help
Alex Ar [27]

Answer:

900 batteries

Step-by-step explanation:

First we must find how many batteries does 1 calculator need

we can do this by dividing 160 by 40

which will give us 4 batteries per calculator

then we multiply the amount of calculators we have with 4

225×4 = 900 so we need 900 batteries

4 0
2 years ago
Me ajudem pfvr!!!!....
defon
Respuesta:
Allí está el proceso, de nada <3

7 0
2 years ago
Pythagorean theorem
SpyIntel [72]
<span>the pythagorean theorem says the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides (when u add them together)</span>
6 0
3 years ago
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Simplify the expression. ( 5 x 2 − 3 x ) − ( 5 x 2 − 3 x + 1 )
iren [92.7K]

Answer:

-1

Step-by-step explanation:

Following PEMDAS The answer equals to -1

<u>*plssss make me brainlist*</u>

6 0
3 years ago
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