A class is taking a multiple choice test with 10 questions where each question has four possible answers. Assume that the answer to any question is independent of that to any other answer. Robert has forgotten to study for this test, so he simply guesses for each question. What is the probability that Robert guesses exactly 8 of the questions correctly? (Round to four decimal places.)  What is the probability that Robert gets an 80% or better? Another way of saying this is, what is the probability that he guesses 8 or more questions correctly? This would be the probability of 8 plus the probability of 9 plus the probability of 10. (Round to four decimal places.)

Q: How are your grades? In a recent semester at a local university, 400 students enrolled in both…

A: given data  n(total) = 400 n(A in statistics) = 90 n(A in psychology) = 68 n(A in both) = 31

Q: Makayla is flying from Memphis to Oklahoma City with a connection in Denver. The probability her…

A:

Q: test is conducted with 25 multiple choice questions. Each question has 3 possible choices, so the…

A: n=25,p=13Let p be the probability of student gets any of the questions right.X be the number of…

Q: Canadians is chosen, find the probability that fewer than 3 respondents will support the seal hunt.

A:

Q: You are to flip a fair coin, where probability of heads is equal to 50% (and tails is 50%). The fair…

A: Answer:- Given, The probability of head , P(H) = 50% = 0.50  The fair coin is flipped, n = 100000…

Q: A student takes a 20-question multiple-choice test with 4 choices for each question. If the student…

A: The sample size n is 20.

Q: A. Find the probability of randomly selecting a student who spent the​ money, given that the student…

A:

Q: Suppose that 60% of people have brown eyes and that 5% of people have red hair. We randomly select…

A: Given information: Let A be the event that  people have brown eyes. P(A)= 0.60B be the event that…

Q: A student takes a 20-question multiple-choice test with 4 choices for each question. If the student…

A: The sample size n is 20.

Q: Camila sets up a passcode on her smart phone, which allows only five-digit codes. She has heard that…

A: Given : The passcode consists of 5 digits  Out of 5 digits one digit appeared 2 times (because…

Q: Kiara sets up a passcode on her tablet, which allows only six-digit codes. She has heard that it's…

A: Kiara sets up a pass-code on her tablet, which allows only six-digit codes. She has heard that it's…

Q: I need help with providing the formula and answer... Question: If your stats class contains 10…

A: 10 business majors 6 - biology majors 4 - math majors ________________________ 20 - total students…

Q: A survey of Indiana, PA residents finds that 68% like Bob's Sub, 83% like Culpepper's, and 56% like…

A: Let A be the event that the residents like Bob's Sub and B be the event that residents like…

Q: In a certain city district, the need for money to buy drugs is stated as the reason for 63% of all…

A: Solution-: Given: n=5,p=0.63 (Or 63%) Our aim to find, (a) P(X=2)=? (b) P(X≤3)=?

Q: In the game of blackjack played with one deck, a player is initially dealt 2 different cards from…

A:

Q: If the probability of a defective light bulb is 0.01, to be 92.5 % confident, up to how many…

A: Given information: PDefective=0.01, n=40

Q: Use the appropriate table to solve this problem: At an online computer store 60% of computers sold…

A: Given that at an online computer store 60% of computers sold are laptops.

Q: Lindsay is checking out books at the library, and she is primarily interested in mysteries and…

A: Answer:- Lindsay select 10 mysteries and 8 nonfiction books  Therefore, total number of books (r) =…

Q: If one card is drawn from an ordinary deck of cards, find the probability of getting the following.…

A:

Q: Meals are often served at a conference. At one conference: 50% went to breakfast 73% went to dinner…

A: According to the given information, we have P(breakfast) = 50%=0.50P(dinner) = 73% = 0.73P(breakfast…

Q: Jeannie took a week's vacation from school and never made up the work. She is guessing answers on a…

A: If each trial has only two possible outcomes, that is, success and failure, the probabilities of…

Q: The probability that a person catches a cold during the cold and flu season is 0.4. If 10 persons…

A: We have given that- P(a person catches a cold during the cold and flu season) = 0.4 Sample size, n =…

Q: Which of the following problems must be determined using a combination? Determine the probability of…

A: We have given that four different problems. Here we need to find out that which are determined by…

Q: You are taking a multiple-choice quiz that consists of 10 questions. Each question has 5 possible…

A:

Q: Professor Ivy takes a poll of the nursing students and the engineering students and asks them if…

A:

Q: How are your grades? In a recent semester at a local university, 700 students enrolled in both…

A: Let S=students got an A in statisticsP=students got an A in psychologyGiven,n(S)=88n(P)=62n(S∩P)=46

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.