A Student taking a midterm exam in Ancient History comes to two questions pertai

Question

A Student taking a midterm exam in Ancient History comes to two questions pertaining to a lecture that be missed, and so he decides to take a random guess on both questions. One question is true-false and other is multiple choice with five possible answers. What is the probability of guessing: the correct answer to the true/false question? ________________ the correct answer to the multiple choice question? _________________ the correct answer to the true/false question and the multiple choice question? _________________ the incorrect answer to the true/false question and the multiple choice question? _________________ the correct answer to the true/false question and the incorrect answer to the multiple choice question? _________________ the incorrect answer to the true/false question and the correct answer to the multiple choice question? _________________ For the density curve below, what percent of the observations lie below 0.6? Explain your answer, or shown your work, for full credit. ____________ Find the number z such that the proportion of observations that are less than z in a normal distribution is 0.7. __________________ Find the number z such that 35% of all observations from a standard normal distribution are greater than z._________________

Explanation / Answer

5)

a) T-F correct=1/2

b) Mutiple choice correct = 1/5

c) Both correct = 1/2*1/5 = 1/10

d) Both incorrect = 1- Both correct = 1-1/10 = 9/10

e) T-F correct and Multiple Choice incorrect = 1/2 * (1-1/5) = 4/10 = 2/5

f) T-F incorrect and Multiple Choice correct = (1-1/2)*1/5 = 1/10

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