Della has over 500500500 songs on her mobile phone, and she wants to estimate what proportion of the songs are by a female artist. She takes an SRS of 505050 songs on her phone and finds that 202020 of the songs sampled are by a female artist. Based on this sample, which of the following is a 99\%99%99, percent confidence interval for the proportion of songs on her phone that are by a female artist?

0.40 2.576 √0.40(0.60)

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50

Step-by-step explanation:

Put a upside down T which is the Plus-minus sign in between .40 and 2.576

3.4 plus minus 2.77(.72/V28)

E

Step-by-step explanation:Kahn

answer: b. f(x) = (x + 2)^3 (x^2 - 7x + 3)^4

step-by-step explanation:

polynomials always have as many roots as their order. this is a 4th order polynomial- hence 4 roots!

complex roots of polynomials always come in pairs. the quadratic equation has the "+/-" in that will alwaysgenerate m+ni amd m-ni, so 7-2i must be a root of this polynomial equation.

the order of the numerator and denominator are both 2. so the horizontal asymptote is y=a2/b2 =7

verticle asymptotes are the forbidden x-values. f(x) becomes undefined at x=-3 because this value will cause a zero denominator.

a graph of r(x) will have vertical asymptotes at ±1 because these values will make the denominator zero. so the domain of the function cannot include ±1.

you 're wlecome! : )

cretdit to source

20%

step-by-step explanation: