A student guesses blindly on a 20 question true/false test. a) Using the binomial probability formula,...

A student guesses blindly on a 20 question true/false test.

a) Using the binomial probability formula, find probability the student gets exactly 3 out 20 correct.

b) Using the binomial probability formula, find probability the student gets 3 or less questions correct.

c) Using a calculator or table of values, find probability the student gets at least a 60% score on the test.

Expert Solution

orchestra answered 1 year ago

11) A student takes a true-false test that has 20 questions and guesses randomly at each...

11) A student takes a true-false test that has 20 questions and guesses randomly at each answer. Let X be the number of questions answered correctly. Find P(19 or more) A) 0.1719 B) 0.006 C) 0.00002 D) 0.07 12) It is estimated that 35% of households own a riding lawn mower. A sample of 10 households is studied. What is the probability that more than 7 of these own a riding lawn mower? (hint: you can use binomial or independent...

Question 12 A student takes an 8-question, true-false exam and guesses on each question. Find the...

Question 12 A student takes an 8-question, true-false exam and guesses on each question. Find the probability of passing if the lowest passing grade is 6 correct out of 8. a. 0.109 b. 0.227 c. 0.144 d. 0.164 Question 13 R.H. Bruskin Associates Market Research found that 30% of Americans do not think having a college education is important to succeed in the business world. If a random sample of 5 Americans is selected, find this probability: At most...

A student is making independent random guesses on a test. The probability the student guess correctly...

A student is making independent random guesses on a test. The probability the student guess correctly is 0.5 for each question. Assume that the guesses are independent. Find the probability of 13 or more correct in 20 guesses. Round your answer to 3 decimal places.

1.) A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer....

1.) A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer. Find the probability that the student passes the quiz with a grade of at least 70% of the questions correct. 1. Identify 2. First, find the number of correct questions needed to get 70%. 3. Then write an appropriate probability statement. 4. Then find the probability 2.) Suppose that about 85% of graduating students attend their graduation. A group of 22 graduating students is randomly...

A true/false test has ? = 20 questions. If a student is simply guessing the answers...

A true/false test has ? = 20 questions. If a student is simply guessing the answers (so there is a 50% chance of getting correct for each question), a) what is the mean and standard deviation of the number of questions the student would get correct? Mean = ______, Standard deviation = ______ b) what is the approximate probability (approximated by a normal distribution) that this student would get at least 15 questions correct? P (at least 15 questions correct)...

Using the Binomial Distribution Assume that two students must take a ten question, True or False...

Using the Binomial Distribution Assume that two students must take a ten question, True or False quiz. Student 1 has not studied at all and guesses randomly on each question. Student 2 has studied hard and has a 95% chance of answering any particular question correctly. For each student, calculate the probability of passing (getting 7 or more correct answers) and the probability of “acing” (getting 9 or 10 correct answers) the quiz. What do your calculated probabilities say about...

1) Using the Binomial Distribution formula find the probability that a family that has 13 children...

1) Using the Binomial Distribution formula find the probability that a family that has 13 children has 10 girls. 2) Given the paired data set below of Super Models ( heights and weights) to determine the line of regression. X | 65 67 62 70 66 69 61 67 65 69 Y |110 105 113 107 109 113 104 110 116 115 3) Calculate the Coefficient of Correlation. 4) Using the data from problem 23 predict the weight of a...

Question 1 The binomial formula has two parts. The first part of the binomial formula calculates...

Question 1 The binomial formula has two parts. The first part of the binomial formula calculates the number of combinations of X successes. The second part of the binomial formula calculates the probability associated with the combination of success and failures. If N=4 and X=2, and p = .5, what is that probability from the second part of the formula? Group of answer choices .0625 .5 .3750 .1563 Question 2 Normal Distribution Problem. The birth weight is of newborn babies...

Compute P(X) using the binomial probability formula. Then determine whether the normal distribution can be used...

Compute P(X) using the binomial probability formula. Then determine whether the normal distribution can be used to estimate this probability. If so, approximate P(X) using the normal distribution and compare the result with the exact probability. nequals62, pequals0.3, and Xequals8

Compute P(X) using the binomial probability formula. Then determine whether the normal distribution can be used...

Compute P(X) using the binomial probability formula. Then determine whether the normal distribution can be used to estimate this probability. If so, approximate P(X) using the normal distribution and compare the result with the exact probability. n=40, p=0.35, X=20 P (X) = Can the normal distribution be used to approximate thisprobability? Approximate P(X) using the normal distribution. Use a standard normal distribution table. Select the correct choice below and fill in any answer boxes in your choice. By how much...

Question

A student guesses blindly on a 20 question true/false test. a) Using the binomial probability formula,...

Solutions

Expert Solution

Related Solutions

11) A student takes a true-false test that has 20 questions and guesses randomly at each...

Question 12 A student takes an 8-question, true-false exam and guesses on each question. Find the...

A student is making independent random guesses on a test. The probability the student guess correctly...

1.) A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer....

A true/false test has ? = 20 questions. If a student is simply guessing the answers...

Using the Binomial Distribution Assume that two students must take a ten question, True or False...

1) Using the Binomial Distribution formula find the probability that a family that has 13 children...

Question 1 The binomial formula has two parts. The first part of the binomial formula calculates...

Compute P(X) using the binomial probability formula. Then determine whether the normal distribution can be used...

Compute P(X) using the binomial probability formula. Then determine whether the normal distribution can be used...