Some standardized tests such as the sat test incorporate a penalty for wrong answers. for example, a multiple choice question with 5 possible answers will have 1 point awarded for a correct answer and 1/4 point deducted for an incorrect answer. questions left blank are worth 0 points.
a. find the expected number of points received for a multiple choice question with 5 possible answers when a student just guesses. (that means they they answered all questions by guessing, they did not leave any blank.) show how you got your answer. explain what it means.
b. explain why there is a deduction for wrong answers. statistics, 4th edition, michael sullivan, pearson, p333
i know that p(correct answer) 1/5 because tghere is only 1 point for correct answer p(incorrect answer)= 4/5 because there are 4 possible incorrect answer
i have no clue on how p(left the blank) = 1/2 explain
can you also explanin what it means

b

step-by-step explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (3, - 5) ← 2 points on the line

m = = = - 3

with m = - 3 and (a, b) = (3, - 5), then

y - (- 5) = - 3(x - 3), that is

y + 5 = - 3(x - 3) → b

answer: 12,000

step-by-step explanation: first you ar e supposed to add. then multiply then subtract

yes, gavin is right.

step-by-step explanation:

gavin is correct. 

this problem is about converting 9% per year to how many percent per quarter. the rate is still the same. it only differed in the time period. so, through dimensional analysis,

9% per year  × (1 year / 4 quarters) = 2.25% per quarter

if he was asked to convert 9% per year to how many percent per quarter  compounded quarterly, then you will not simply divide by four. this is because compounding is not linear.

hope this , have a good day. c;