Asmall stock brokerage firm wants to determine the average daily sales (in dollars) of stocks to their clients. a sample of the sales for 36 days revealed average daily sales of $200,000. assume that the standard deviation of the population is known to be $18,000.

a. provide a 95% confidence interval estimate for the average daily sale.

b. provide a 97% confidence interval estimate for the average daily sale.

step-by-step explanation:

- (2, -7)

- lines r and s and lines t and u must be parallel

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)

365

step-by-step explanation: