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Talja [164]
3 years ago
7

1. You are conducting a survey of the people in the United States to find out how popular racket sports (tennis, badminton, racq

uetball, etc.) are. You randomly choose people to call and make 1,000 calls to people across the country. In this study, what is the statistics term for the people you called? A. Both the people of the U.S. and the people you call are populations B. The people of the U.S. are the population and the people you called are the sample C. The people of the U.S. are the sample and the people you called are the population D. Both the people of the U.S. and the people you called are samples​
Mathematics
2 answers:
andrey2020 [161]3 years ago
4 0

Answer:

i think it's d

Step-by-step explanation:

lions [1.4K]3 years ago
3 0

Answer:

welcome to brainly thanks for adding your first question i hope you enjoy it here at brainly

Step-by-step explanation:

D. Both the people of the U.S. and the people you called are samples​

because if you choose a population and residents they would problaly give you the same things and others from the sample will give you different answers so d is your best bet

hope this helps enjoy brainly

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Answer:

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Step-by-step explanation:

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f'(x)=6\left ( \frac{1}{3} \right )x^{\frac{-2}{3}}+3\left ( \frac{4}{3} \right )x^{\frac{1}{3}}=\frac{2}{x^{\frac{2}{3}}}+4x^{\frac{1}{3}}

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f''(x)=2\left ( \frac{-2}{3} \right )x^{\frac{-5}{3}}+\frac{4}{3}x^{\frac{-2}{3}}=\frac{-4x^{\frac{2}{3}}+4x^{\frac{5}{3}}}{3x^{\frac{2}{3}}x^{\frac{5}{3}}}\\f''(x)=0\Rightarrow \frac{-4x^{\frac{2}{3}}+4x^{\frac{5}{3}}}{3x^{\frac{2}{3}}x^{\frac{5}{3}}}=0\Rightarrow x=1

At x = \frac{-1}{2},

f''\left ( \frac{-1}{2} \right )=\frac{4\left ( -1+4\left ( \frac{-1}{2} \right ) \right )}{3\left ( \frac{-1}{2} \right )^{\frac{5}{3}}}>0

We know that if f''(a)>0 then x = a is a point of minima.

So, x=\frac{-1}{2} is a point of minima.

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Inflexion points are the points at which f''(x) = 0 or f''(x) is not defined.

So, x-coordinates of the inflexion points are 0, 1

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Step-by-step explanation:

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