You are designing a study to look at birth outcomes of teenage pregnancies. The first variable you want to evaluate is birth weight. You want to know how many teenage mothers you need to sample in order to accurately estimate the confidence interval for the mean birth weight of babies born to mothers age 15 and under. Your confidence interval is 95% and your margin of error cannot exceed 100 g. Based on information you have obtained from the State Office of Vital Records you have an estimated mean birth weight of 3300 g with a standard deviation of 270 g. Conduct a sample size calculation. What is the smallest number of teenage mothers you will need to make an accurate estimate

(x3 + 6x2 + 2x - 6) • (x - 1)

step-by-step explanation:

polynomial long division :

3.2     polynomial long division

dividing :   x4+5x3-4x2-8x+6

                              ("dividend")

by         :     x-1     ("divisor")

dividend     x4   +   5x3   -   4x2   -   8x   +   6

- divisor   * x3     x4   -   x3            

remainder         6x3   -   4x2   -   8x   +   6

- divisor   * 6x2         6x3   -   6x2        

remainder             2x2   -   8x   +   6

- divisor   * 2x1             2x2   -   2x    

remainder               -   6x   +   6

- divisor   * -6x0               -   6x   +   6

remainder                     0

quotient :   x3+6x2+2x-6   remainder:   0

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