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barxatty [35]
3 years ago
14

A tax assessor wants to assess the mean property tax bill for all homeowners in a certain state. From a survey ten years ago, a

sample of 14 property tax bills is given below. Assume the property tax bill is approximately normally distributed. Use a TI-83, TI-83 plus, or TI-84 calculator to construct a 90% confidence interval for the population mean property tax bill. Round your answers to one decimal place and use increasing order.
Property Tax Bill
1715.35
1157.82
651.10
1093.36
1609.22
1391.47
1398.89
402.99
1028.76
1571.23
529.42
1579.48
699.56
2222.16
838.60
866.41
1066.60
1498.64
1784.28
2016.99
2465.65
1098.81
1346.65
1574.00
1447.78
2018.33
2156.75
1710.81
Mathematics
1 answer:
Jet001 [13]3 years ago
7 0

Answer:

The answer is below

Step-by-step explanation:

From the table, the mean (μ) = 1390.75 and the standard deviation (σ) = 518.75

The confidence level (C) = 90% = 0.9

α = 1 - C = 1 - 0.9 = 0.1

α/2 = 0.1 / 2 = 0.05

The z score of α/2 (0.05) is the same as the z score of 0.45 (0.5 - 0.05) which is equal to 1.645.

The margin of error (E) is given as:

E=Z_\frac{\alpha}{2}*\frac{\sigma}{\sqrt{n} }  \\\\E=1.645*\frac{518.75}{\sqrt{14} } =228.07

The confidence interval = μ ± E = 1390.75 ± 228.07 = (1162.68, 1618.82)

The confidence interval is between 1162.68 and 1618.82.

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The value of y varies directly with x. If x = 218, then y = 436. What is
adell [148]

Answer:

<h2>x = 7</h2>

Step-by-step explanation:

To find the value of the value of x when

y = 14 we must first find the relationship between them

The statement

The value of y varies directly with x is written as

y \:  \:  \:  \alpha  \:  \:  \: kx

where k is the constant of proportionality

when x = 218

y = 436

So we have

436 = 218k

Divide both sides by 218

k = 2

So the formula for the variation is

<h2>y = 2x</h2>

when y = 14

We have

14 = 2x

Divide both sides by 2

<h3>x = 7</h3>

Hope this helps you.

5 0
3 years ago
I really need help with this it’s on Aleks
liraira [26]

Answer:

y = 2

Step-by-step explanation:

Given

\sqrt[3]{3y+2} + 4 = 6 ( subtract 4 from both sides )

\sqrt[3]{3y+2} = 2 ( cube both sides )

3y + 2 = 2³ = 8 ( subtract 2 from both sides )

3y = 6 ( divide both sides by 3 )

y = 2

6 0
3 years ago
Read 2 more answers
HELP NEEDED ASAP MATHS PLEASE!!!
BabaBlast [244]
You plug in the values for x in each respective equation.

a) f(3) = 3 + 1 which equals: 4.
so, f(3) = 4

b) g(3) = (3)^2 - 3 which equals 9 - 3, which equals 6.
so, g(3) = 6.

hope this helps! (:
5 0
3 years ago
3.9 practice complete your assignment english 111
Citrus2011 [14]
The answer is 15.9 because 3.9+111=15.9
3 0
3 years ago
I will give you the brainliest if you answer asap please
IRINA_888 [86]

Answer:

168

Step-by-step explanation:

You just need to triple the answer to get 168.

8 0
3 years ago
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