The final exam scores in a statistics class were normally distributed with a mean of 63 and a standard deviation of five. a. Find the probability that a randomly selected student scored more than 65 on the exam.

Q: A survey indicates that people use their computers an average of 4.5 years before buying a new one.…

A: GivenMean(μ)=4.5standard deviation(σ)=0.75

Q: The probabilities that a student will receive an A, B, C or D grade are 0.4, 0.3 0.2 and 0.1…

A: The following information has been provided: The probabilities that student will receive grade A…

Q: You and a group of friends are going to a five-day outdoor music festival during spring break. You…

A: Given  45% chance of rain on the first day,  55% chance of rain on the second day,  10% chance of…

Q: An individual golfer's scores have a mean of 90.4 and a standard deviation of 5.3. What is the…

A: given data μ = 90.4σ = 5.3P(x<82) = ?

Q: Two events A and B are such that P(A) = 0.51, P(B) = 0.39 and P(An B) = 0.13. Calculate P(A/B).…

A: Solution

Q: Example An urn contains 6 red marbles and 4 black marbles. Two marbles are drawn without replacement…

A: We have given that Number of Red marbles = 6 Number of black marbles = 4 Total number of marbles = 6…

Q: e joint density function for a pair of random variables X and Y is given. (Round your answers to…

A:

Q: From a bag containing 24 black balls and 24 white balls, two balls are drawn one at a time. Find the…

A: given data  24 black balls 24 white balls _______________ 48 total balls select 2 at random select…

Q: Dave's wardrobe contains 25 T-shirts, of which 12 are gray. Dave selects a T-shirt at random. What…

A: General formula of probability is ,   Probability = Number of favorable outcomes Total outcomes

Q: A room contains 3 brown, 5 black and 4 white chairs. Two chairs are picked and are put in the lawn.…

A: given data  3 brown 5 black4 white _____________12 total chairsselect two at random P(none are…

Q: Describe the Lucas sequence in 1 or 2 sentences. Then, find the 9th and 10th terms of the Fibonacci…

A:

Q: The minimum wage in the 13 states shown in the following table were in effect as of January 2016.†…

A: From the provided information, Sample size (n) = 13 The data values are as follow: 9.75, 8.00,…

Q: A radio station runs a promotion at an auto show with a money box with 12 $50 tickets, 15 $25…

A: The probability that all three tickets drawn have no money value is 0.0317

Q: In a party there are 5 couples. Out of them 5 people are chosen at random. Find the probability that…

A:

Q: A fair cubical die is thrown twice and their scores summed up. If the sum of the scores of upper…

A: Two dice are thrown. Sum of the outcomes is an event. Then possible events are, X:…

Q: The probabilities that a student will receive an A, B, C or D grade are 0.4, 0.3 0.2 and 0.1…

A: From the provided information, The probability distribution table for grades can be constructed as:…

Q: 2. Suppose that earthquakes occur in a certain region of California, in accordance with a Poisson…

A: Given that, Earthquakes occur in a certain region of California, in accordance with a Poisson…

Q: Find the probability of getting 8 heads in a row in 8 tosses of a fair coin.

A: The random variable of heads. Here, X follows binomial with n= 8 and p= 0.5.

Q: 4. The time (in hours) required to repair a machine is an exponentially distributed random variable…

A: A continuous random variable X is said to follow Exponential distribution with parameter θ if its…

Q: 1. Let C, D E F. Suppose P(C): = 9 10 and P(D) = D(D) 4 5 show that P(CND) Z 7 10

A: Hello! As you have posted 4 different questions, we are answering the first question. In case you…

Q: How many times do we have to flip a balanced coin to be able to assert with a probability of at most…

A:

Q: An electronic system has 2 subsystems A and B. It is known that P (A fails) = 0.2 P (B fails alone)…

A: P(A fails) = 0.2P(B fails alone) = 0.15P(A and B fail) = 0.15 P(B fails) = P( B fails alone) + P(A…

Q: A shipment of 120 burglar alarms contains 5 that are defective. If 3 of these alarms are randomly…

A:

Q: Sheet 3 a. With the aid of two tables for the two data sets, determine the following: Mean Variance…

A: Hi there! Thank you for the question. As per the honor code, we are allowed to answer one question…

Q: In a class there are 4 students who are 19 years old and obtained 80 pints in the midterm. There are…

A: Given : 4 students of age 19 got 80 points 6 students of age 19 got 50 points 6 students of age 20…

Q: 1000 people from the state of Califomia and an SRS of 1000 people from the city of a simple random…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: A single player is dealt 8 cards from a standard 52-card deck. What is the probability that the 5th…

A: In a pack of cards, there are 52 cards. Among these, there are 4 suits, each suit having 13 cards.…

Q: he distribution of lowa Test of Basic Skills vocabulary scores for seventh-grade students in Gary,…

A: Given,Mean(μ)=6.84Standard deviation(σ)=1.55

Q: Suppose that an employee at a local company checks his watch and realizes that he has 10 minutes to…

A: Given The following table displays the probability that he is stopped by each of the three traffic…

Q: Burger Prince Restaurant is considering the purchase of a $100,000 fire insurance policy. The fire…

A: Given data: Fire damage $100,000 $75,000 $50,000 $25,000 $10,000 $0 Probability  0.006 0.002…

Q: Here we have a random walk (with p=1/2) on the integers in the range [0,7] (endpoints 0 and 7 are…

A: From the given information, Let Sn=x0+X1+X2+....+Xn be the simple random walk at time n and starts…

Q: From 20 tickets marked with the first 20 numerals, one is drawn at random, what is the chance that…

A:

Q: Suppose we toss a pair of fair, seven-sided heptahedral polyhedron with seven faces, in which one of…

A: Probability of occurring any outcome on the white heptahedral polyhedron is equal to  P(X)= 1/7 And…

Q: One of the early studies linking smoking and lung cancer compared patients hospitalized with lung…

A: Here, the test is conducted to check whether smoking causes lung cancer. The null hypothesis will…

Q: In a single throw of two dice, find the probability that neither a doublet nor a total of 8 will…

A: Here, two dice are thrown. Let A denote the event that the dice resulted in a doublet. Let B denote…

Q: Kolkmeyer Manufacturing Company is considering adding two machines to its manufacturing operation.…

A: Given information: The arrival rate is 0.05 machines per hour for each machine, and the service rate…

Q: Are the odds of winning a lotto drawing higher when picking 6 numbers out of 49 or 5 numbers out of…

A: we have to find in which case odds of winning is higher? (A) pick 6 numbers out of 49 (B) pick 5…

Q: In 1953, N. Keyfitz published a study in the American Journal of Sociology entitled, "A Factorial…

A: Given information, The number of children of women who were aged 15-19 when first married. Provide…

Q: Three randomly selected households are surveyed. The numbers of people in the households are 2, 4,…

A: Hint:  Sample variance, S2=1n-1∑yi-y¯2 Population Variance =σ2=1N∑Yi-Y¯2

Q: (1). If we toss a fair coin 3 times, let X and Y be the number of heads and the number of tails…

A:

Q: Suppose we have 15 cans of soup with no labels, but 6 are tomato and 9 are pea soup. We randomly…

A:

Q: During one stage in the manufacture of integrated circuit chips, a coating must be applied. If 70%…

A: Given,n=15p=0.7q=1-0.7=0.3A random variable X~Binomial(n=15  , p=0.7)P(X=x)=Cx15(0.7)x(0.3)15-x   ;…

Q: In a flow system, the arrival rate to a particular station is 40 units per hour. The station has 4…

A: Given:-                 Average rate of arrival λ = 40 / hr.                 Average rate of service…

Q: The quadratic regression equation y = –0.1x2 + 143.99x – 13,242.84 models expected company profits…

A: The quadratic regression equation y = –0.1x2 + 143.99x – 13242.84 models expected company profits in…

Q: A room contains 3 brown, 5 black and 4 white chairs. Two chairs are picked and are put in the lawn.…

A: given data  3 brown chairs 5 black chairs 4 white chairs _________________ 12 total chairs

Q: 6. Explain what is wrong with the following statement: I flip a coin ten times, and record the…

A: A coin has two possible outcomes i.e. head or tail. Both are equally likely possible to occur.

Q: During one stage in the manufacture of integrated circuit chips, a coating must be applied. If 70%…

A:

Q: is distributed as a standard normal variable. Given the following probability, find the z…

A: given data, z is distributed as a standard normal variable x~N(0,1)value of  a such that…

Q: In a certain sock drawer, there are 5 white and 4 black unmatched socks.  You reach in and pick 2…

A: given data  5 white cocks 4 black socks ___________ 9 total socks    pick 2 socks at random(without…

Q: joint USA Today/CNN/Gallup Poll in July 2020 indicated that of 832 white adults, 46% thought…

A: Given n=832 P=0.46