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dlinn [17]
2 years ago
13

Using a Simple Radom Sample of 500 rental property owners in Washington State, a 95% confidence interval estimate of the proport

ion who own rental property by the water is (0.281, 0.392). Which of the following is the correct interpretation of this interval?
a. Ninety-five percent of all samples of size 500 will result in a proportion of rental property between 0.281 and 0.392.
b. There is probability equal to 0.95 that the proportion of owning a rental property by the water is between 0.281 and 0.392
c. 95% confident that the sample proportion of rental propery owners in Washington is between 28.1% and 39.2%.
d. We can be 95% confident that between 28.1% and 39.2% of all rental property owners own a property by the water
Mathematics
1 answer:
Feliz [49]2 years ago
3 0

Answer:

Hence the correct option is option d.

Explanation:

We can 95% confident that between 28.1% and 39.2% of all rental property owners own a property by the water.  

Here correct option for interpretation of the 95% confidence interval. The remaining options are about probabilities and sample proportions.

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3 years ago
The weights of cars passing over a bridge have a mean of 3,550 pounds and standard deviation of 870 pounds. Assume that the weig
Annette [7]

Answer:

0.24315

Step-by-step explanation:

Using the z score formula to solve this question

z = (x - μ) / σ,

Such that:

x = raw score

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From the question:

x = 3000

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z = (3000 - 3550) / 870

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Using the z score table as well as probability calculator(as requested in the question to find the z score)

The probability of having less than 3000 is obtained as:

P(x<3000) = 0.24315

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3 years ago
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Step-by-step explanation:

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-4 x^2 + 4 x - 10

Factor -2 out of -4 x^2 + 4 x - 10:

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1/8 +c= 4/5 what does c equal ​
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Answer:

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Step-by-step explanation:

the statement give us the expression:

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we subtract the term "1/8" both sides:

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1/8 -1/8+c= 4/5-1/8

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c=(4*8)-(5*1)/(5*8)

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7 0
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At your job, you are paid $50 per week plus $3 per sale. At least how many sales do you need to make in order to have over $250
julsineya [31]

<span>0+3⋅c>250</span>

<span>50+3⋅c−50>250−50</span>

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<span>c><span>66.7</span></span>

<span><span>so 67 sales rouned</span></span>

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