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svlad2 [7]
3 years ago
5

Which one is at better value and show work

Mathematics
1 answer:
kogti [31]3 years ago
4 0
360/0.96 or 510/1.44

360/0.96

0.96/360

.........3.76
_________
96/36000
......288
___________
.........720
.........672
_________
...........580
............576
_________
.................4

___________
510/1.44

............354
____________
144/ 51000
.........432
________
780
720
---------------
600
576
------------------
24

360g at $0.96 is best deal
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In a study on the time that
krok68 [10]

The 95% confidence interval of the population mean, in years, is (4.3, 5.3). 4 years is not part of the confidence interval, which means that it contradicts the fact that 39% of students get their college degree in four years.

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

To solve this question, we need to find the confidence interval for the amount of time it takes the students to get the degree.

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

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

The first step to solve this problem is finding how many degrees of freedom,which is the sample size subtracted by 1. So

df = 80 - 1 = 79

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

95% confidence interval

Standard level of confidence, we have to find a value of T, which is found looking at the t table, with 79 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 1.9905.

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

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.9905\frac{2.2}{\sqrt{80}} = 0.5

In which s is the standard deviation of the sample and n is the size of the sample.

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

The lower end of the interval is the sample mean subtracted by M. So it is 4.8 - 0.3 = 4.3 years.

The upper end of the interval is the sample mean added to M. So it is 4.8 + 0.3 = 5.3 years.

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

The 95% confidence interval of the population mean, in years, is (4.3, 5.3). 4 years is not part of the confidence interval, which means that it contradicts the fact that 39% of students get their college degree in four years.

A similar question is given at brainly.com/question/24278748

6 0
3 years ago
Please help i need this done soon!
Kamila [148]

Answer:

this is my old account and these still dont have answers

Step-by-step explanation:

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3 years ago
A circle has a radius of 3. An arc in this circle has a central angle of 60 degrees. What is the length of the arc?
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Answer:

The answer is 3.14 units

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3 years ago
Which of the following graphs represents the inequality 10x-5y<img src="https://tex.z-dn.net/?f=%5Cleq" id="TexFormula1" title="
puteri [66]

Answer:

1st Graph

Step-by-step explanation:

Edge2020

8 0
2 years ago
I bought a carpet for my bedroom. The length of the carpet was 6 ft. The width was 12 ft. How many square feet is my carpet?
8090 [49]
72 square feet

EXPLANATION: when finding area of a rectangle, multiple Length x Width and 6x12=72
5 0
3 years ago
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