Saturday
April 19, 2014

Homework Help: Statistics

Posted by PetarI on Monday, November 19, 2012 at 8:17pm.

Over time, a student analyzes her ability to guess correctly after narrowing down multiple choice answers in a 5-selection question (a thru e). She discovers that if she narrows her answers to 2 or 3 choices, her probability of getting the right answer is 0.8, but if she still has 4 or 5 choices left, her probability of choosing correctly decreases drastically to 0.1. Assuming that in general she can narrow his choices to 2-3 choices 70% of the time, answer the following probability questions.

a. What is the probability that she will answer a question correctly any time she must guess?

b. Given that the student answered correctly, what is the probability that she had narrowed her choices to 2-3?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

statistics - One student is selected at random from a student body. Suppose the ...
math - three students took part in an after-school science club. Each student ...
Statistics - A student is taking a multiple-choice exam with 16 questions. Each ...
statistics - The director of the campus-computing center did a study to ...
statistics - A random sample of 36 statistics students were asked to add a ...
statistics - A person scores 81 on a test of verbal ability and 6.4 on a test of...
statistics - A person scores 81 on a test of verbal ability and 6.4 on a test of...
Statistics - A student studies for a statistics exam where all questions are ...
English - A key to the studentís ability to apply strategies so that school ...
Statistics - On a chemistry exam, Student A scored a 81 and Student B scored a ...

Search
Members