A multiple choice test has 20 items with four possible, Ask an Expert

Statistics

A multiple choice test has 20 items with four possible answers given for each item. 12 is the minimum passing score.

a) What is the probability of passing simply by guessing?

b) What is the probability of passing if you are able to eliminate one choice each time but guess among the remaining three choices?

c) Suppose the questions come from a large test bank and you know the correct answer to 50% of the questions in the test bank, can eliminate one choice for 40% of the questions, and have to guess blindly for the other 10% of the questions. If the questions are selected from the test bank independently at random, what is the probability that you pass the test?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M92652771

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

In a pre-election poll a candidate for district attorney

In a pre-election poll, a candidate for district attorney receives 304 of 600 votes. Assuming that the people polled represent a random sample of the voting population, test the claim that a majority of voters support th ...

According to annbspairline flights on a certain route are

According to an? airline, flights on a certain route are on time 80% of the time. Suppose 13 flights are randomly selected and the number of?flights is recorded. ?a) Explain why this is a binomial experiment. ?b) Deter ...

1 summary statistics for returns on two stocks x and y are

1. Summary statistics for returns on two stocks X and Y are listed below. Mean Variance Stock X 2.83% 0.006000 Stock Y 5.98% 0.003000 The covariance of returns on stocks X and Y is 0.001500. Consider a portfolio of 80% s ...

The weights of bags of peas are normally distributed with a

The weights of bags of peas are normally distributed with a mean of 12.08 ounces and a standard deviation of 1.03 ounces. Bags in the upper 4% are too heavy and must be repackaged. What is the most that bag and weigh and ...

1 a certain compact disc player randomly plays each of 10

1. A certain compact disc player randomly plays each of 10 songs on a CD. Once a song is played, it is not repeated until all the songs on the CD have been played. In how many different ways can the CD player play the 10 ...

The mean of a population of raw scores is 50 ox18 what is

The mean of a population of raw scores is 50 (ox=18). What is the probability of randomly selecting a sample of 40 score having a mean above 46?

Next time you see an elderly man check out his nose and

Next time you see an elderly man, check out his nose and ears! While most parts of the human body stop growing as we reach adulthood, studies show that noses and ears continue to grow larger throughout our lifetime. In o ...

In a health club research shows that on average patrons

In a health club, research shows that on average, patrons spend an average of 42.5 minutes on the treadmill, with a standard deviation of 4.8 minutes. It is assumed that this is a normally distributed variable. Find the ...

A gambler plans to play the casino dice game called craps

A gambler plans to play the casino dice game called craps, and he plans to place a bet on the "pass line." Let A be the event of winning. Based on the rules used in almost all casinos, P(A) = 244/495. Describe the event ...

A political candidate wishes to determine if endorsing

A political candidate wishes to determine if endorsing increased social spending is likely to affect her standing in the polls. She has access to data on the popularity of several other candidates who have endorsed incre ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert