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WITCHER [35]
3 years ago
9

1. Below is data collected from a random sample of 40 people at the public library. If the public library has 300 people, then w

hat is a reasonable estimate for the number of people who enjoy reading mysteries?
NON- FICTION 19 people
MYSTERY 12 people
SCIENCE FICTION 9 people​
Mathematics
1 answer:
nataly862011 [7]3 years ago
5 0

Answer:

please do the math luke a lesson and the beta is very weird so you want to do something about that so i suggest that you do 300.

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A survey of 1000 air travelers1 found that prefer a window seat. The sample size is large enough to use the normal distribution,
Ludmilka [50]

Answer:

90% confidence interval for the true proportion of air travelers who prefer the window seat is (0.575, 0.625)

Step-by-step explanation:

We have the following data:

Sample size = n = 1000

Proportion of travelers who prefer window seat = p = 60%

Standard Error = SE = 0.015

We need to construct a 90% confidence interval for the proportion of travelers who prefer window seat. Therefore, we will use One-sample z test about population proportion for constructing the confidence interval. The formula to calculate the confidence interval is:

(p-z_{\frac{\alpha}{2}}\sqrt{\frac{p(1-p)}{n}}, p+z_{\frac{\alpha}{2}}\sqrt{\frac{p(1-p)}{n}})

Since, standard error is calculated as:

SE=\sqrt{\frac{p(1-p)}{n} }

Re-writing the formula of confidence interval:

(p-z_{\frac{\alpha}{2}} \times SE, p+z_{\frac{\alpha}{2}} \times SE)

Here, z_{\frac{\alpha}{2}} is the critical value for 90% confidence interval. From the z-table this value comes out to be 1.645.

Substituting all the values in the formula gives us:

(0.6 - 1.645 \times 0.015, 0.6 + 1.645 \times 0.015)\\\\ = (0.575, 0.625)

Therefore, the 90% confidence interval for the true proportion of air travelers who prefer the window seat is (0.575, 0.625)

5 0
3 years ago
What is the similarity between numbers 85,17,19,4,and 2
8_murik_8 [283]
<span>They are each divisors of 6460.

</span>
8 0
3 years ago
36.78 divided by 2.4 show all work
AlexFokin [52]
\dfrac{36.78}{2.4} =  15.325&#10;
4 0
3 years ago
20(base three)-11(base three) . Carry out the operation in binary system​
bija089 [108]

20₃ - 11₃ = 20₃ - 10₃ - 1₃

… = 10₃ - 1₃

… = 2₃

Put another way, we "borrow a 1" from the 3¹ digits place:

20₃ = 1(3)₃ - 11₃ = 2₃

But this is just the number 2 (in base 10), which in base 2 would be 10₂.

4 0
3 years ago
At the beginning of this year, you went out and purchased $300 worth of gold coins. Every 3 months for the next 8 years, you pur
Lunna [17]

Answer:

9900

Step-by-step explanation:

You start with 300, and add 300 32 times (once for every 3 months in 8 years).

300+9600=9900

7 0
2 years ago
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