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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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Step-by-step explanation:

y = 3/2x +5/4

-2x+8y=-25

--------------------

replace y in second equation with: y = 3/2x +5/4

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3 years ago
I need help with 25.
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Sum of linear pair of angles = 180°

so

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6 0
3 years ago
What is the solution set of 4x^2+3=4x+2​
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3 years ago
The Marked price of a jacket at a dealer's shop is 2400. The dealer allows a discount of 15% to the retailer. As the company's p
Andrej [43]

Answer:

2400

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Step-by-step explanation:

the retailer has to sell it for the same price as the dealer.

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if a customer buys it at the retailer, the retailer makes the 15% discount he got from the dealer as profit.

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the retailer makes this profit no matter what other fees or taxes are added.

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