# Question: Do you remember the earlier study by Katz et al

Do you remember the earlier study by Katz et al. that had students answer SAT-type questions without first reading the passage? (If not, look at Exercises 3.1 and 4.1.) Suppose that we gave out the answer sheets for our Psychology 1 exam mentioned in Exercise 6.3 but forgot to hand out the questions. If students just guessed at random, they would be expected to have a mean of 75 and a standard deviation of 7.5. The exam was taken by 100 students.

(a) Among those who guessed randomly, what would be the cutoff score for the top 10 students?

(b) What would be the cutoff score for the top 25% of the students?

(c) We would expect only 5% of the students to score below _______.

(d) What would you think if 25% of the students got more than 225 questions correct?

(a) Among those who guessed randomly, what would be the cutoff score for the top 10 students?

(b) What would be the cutoff score for the top 25% of the students?

(c) We would expect only 5% of the students to score below _______.

(d) What would you think if 25% of the students got more than 225 questions correct?

## Relevant Questions

Students taking a multiple-choice exam rarely guess randomly. They usually can rule out some answers as preposterous and identify others as good candidates. Moreover, even students who have never taken Psychology 1 would ...I said that the probability of alcohol involvement, given an accident at night, was approximately .50, but I don’t know the probability of an accident, given that you had been drinking. How would you go about finding the ...Suppose that neighborhood soccer players are selling raffle tickets for $500 worth of groceries at a local store, and you bought a $1 ticket for yourself and one for your mother. The children eventually sold 1,000 ...Which parts of Exercise 7.3 dealt with conditional probabilities? In Exercise 7.3 Now suppose that because of the high level of ticket sales, an additional $250 second prize will also be awarded. a) Given that you don’t ...Rerun the calculations in Exercise 8.14 for a 5 .01. In Exercise 8.14 For the distribution in Figure 8.6, I said that the probability of a Type II error (b) is .64. Show how this probability was obtained.Post your question