Use the given information to find the minimum sample size required to estimate an unknown population mean.
how many weeks of data must be randomly sampled to estimate the mean weekly sales of a new line of athletic footwear? we want 99% confidence that the sample mean is within $200 of the population mean, and the population standard deviation is known to be $1,100.
a)117
b)82
c)201
d)165

C) 201

Step-by-step explanation:

Margin of error = critical value × standard error

ME = CV × SE

Assuming n > 30, we can approximate CV with a normal distribution.  At P = 99%, CV = 2.576.

SE = σ / √n

SE = 1100 / √n

Therefore:

200 = 2.576 × 1100 / √n

n = 201

(1, –1), (16, –4), (36, –6)

step-by-step explanation:

given that the function is

this can also be written as

we have to graph this function and check which list of points lie on the graph

see attachment for graph:

we find that the points lying are (1,-1) (16,-4) and (36,-6)

since square root is there we find that x can only be posiitve but y can be since square root both positive and negative.