The length of a human pregnancy follows a Normal distribution with a mean of 266 days and a standard deviation of 16 days a. Find the probability that a randomly selected woman will have a pregnancy of less than 258 days.
b. Find the mean and new standard deviation of the sampling distribution of the mean length of pregnancy for an SRS of 80 women.
(Note: I already know part a, I just can't get the right standard deviation for part b)

left 3, up 4

step-by-step explanation:

just count the values of x & y of the vertex of the graph and see how many units in the x and y direction will get you from the f(x) graph to the f(x) graph

see attached

step-by-step explanation:

given the function as;

write the equation replacing f(x) with y

form   and fill a table containing values of y with corresponding values of x

you can take a range for   values of x as -3≤x≤3

solving for x=-3

for x=-2

repeat the same procedure to get the values of y for the remaining ,x=-1 to x=3

plot the values of y against values   of x and obtain the following graph

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63