The data set from England and Wales also notes for each town whether it was south or north of Derby. Here are some summary statistics and a comparative boxplot for the two regions. Summary of Mortality Group Count Mean Median StdDev North 34 1631.59 1631 138.470 South 27 1388.85 1369 151.114 Two boxplots. d a) What is the overall mean mortality rate for the two regions

the overall mean mortality rate for the two regions is 1524.15

Step-by-step explanation:

Given that;

Summary of Mortality

Group     Count       Mean      Median       Std-Dev  

North         34        1631.59      1631           138.470

South         27       1388.85     1369          151.114

the overall mean mortality rate for the two regions = ?

first we determine number of deaths in the North;

⇒ count × mean = 34 × 1631.59 = 55,474.06

Next,  number of deaths in the South

⇒ count × mean = 27 × 1388.85 = 37,498.95

so, mortality rate for the two region will be;

⇒ (55,474.06 + 37,498.95) / ( 34 + 27 )

= 92,973.01 / 61

= 1,524.1477 ≈ 1524.15

Therefore, the overall mean mortality rate for the two regions is 1524.15

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