4. A simple random sample of the weight of 40 women has a mean of 146.22 lb. Research from other sources suggests that the population standard deviation of weight of women is
30.86 lb. Find a 95% confidence interval estimate of the mean weight of all women.
132.11 lb << 160,33 lb
141.58 lb << 150.86 lb
136.66 lb < p < 155.78 lb
138.19 lb

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.

care to share were the trapezoid shown is ?

the answer is:

mean: 6

mad: 2.14