3.  show your work to find the mean and standard deviation of the data. round to the nearest tenth. 20, 16, 18, 14, 9, 20, 16

Suppose a man is heterozygous for heterochromia, an autosomal dominant disorder which causes two different‑colored eyes in an individual, produced 25‑offspring with his normal‑eyed wife. of their children, 15 were heterochromatic and 10 were‑normal. calculate the chi‑square value for this observation.

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b