An SRS of 400 high school seniors gained an average of ¯=21 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation =48. You can find the critical values to three decimal places by using the last row in table C. (a) Find a 95% confidence interval for the mean change in score in the population of all high school seniors. (Enter your answers rounded to two decimal places.)

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.

h= 12 inches

step-by-step explanation:

answer: rolling a number cube and flipping a coin.

step-by-step explanation:

step-by-step explanation:

the answer is 89 d

i took the test