Adelivery truck manager takes a sample of 25 delivery trucks and calculates the sample mean and sample standard deviation for the cost of operation. a 95% confidence interval for the population mean cost is constructed and found to be $253 to $320. he reasons that this interval contains the mean operating cost for the entire fleet of delivery trucks since the sample mean is contained in this interval.(a) do you agree with his reasoning? (b) how would you interpret this confidence interval? (c) is this an appropriate use of a confidence interval?

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.

can you put the picture up?

step-by-step explanation:

is there a graph

step-by-step explanation: