problems as quickly as possible. The probability for a customer call regarding Internet service interruption is resolved within one hour is 70%. During one day, the company had 10 customer calls. (10 marks) a) What is the probability that exactly four of the customers had their problems solved? (Round your answer to the nearest thousandth). b) What is the mean of the number of calls who had their problems solved? c) What is the variance of the number of calls who had their problems solved?

Q: What is the variance of a set of 6 numbers: 1, 2, 3, 4, 5, 6?

A: The variance is calculated as the average of the squared differences of each number from the mean.

Q: The number of eligible voters in Riverdale total to 1285, but only 402 are registered. What is the…

A: Probability is defined as the total number of favorable cases of an event divided by the total…

Q: b. Draw pie chart shows the favorite social media application used for communication and give your…

A: The given table represents that the 15 student’s details like gender, hours spend in social media…

Q: 6 of the last 10 sundaes sold had nuts. Considering this data, how many of the next 5 sundaes sold…

A: The probability that sundaes sold had nuts is, Psold sundaes have nuts=610=0.6 The probability that…

Q: What is the probability of choosing a penny from a jar of coins that contains 12 pennies, 19…

A: The objective of this question is to find the probability of choosing a penny from a jar of coins…

Q: Suppose the probability of the irs audit was 5.3 percent for US citizens who file and who earned…

A: It is an important part of statistics. It is widely used.

Q: A basketball player has a 75 percent chance of making a free throw. What is the probability of his…

A: INTRODUCTION :  Binomial distribution: a discrete random variable X is said to follow a binomial…

Q: 1. The average number of liters of fresh milk that a person consumes in a month is 18 iters. Assume…

A: Solution: Let x be the fresh milk that a person consumes in a month is normally distributed with…

Q: The national institute of mental health reports a 25% chance of an adult suffering from a…

A: Answer: From the given data, P = 25% = 0.25 Sample size (n) = 7 X follows binomial distribution,

Q: A survey among Harvard students was conducted. It is about their starting position when they sleep…

A: Do the collected data represent a sample or population? Explain your answer.

Q: What is the probability of choosing a penny from a jar of coins that contains 12 pennies, 19…

A: The objective of this question is to find the probability of choosing a penny from a jar of coins…

Q: You want to determine the probability that when five consumers are randomly selected, exactly two of…

A: The question is about binomial prob. distribution Given : No. of randomly selected customers ( n ) =…

Q: The probability that an individual is right-handed is 0.87. In a class of 100 students, what is the…

A:

Q: A magazine reported that 6 percent of all drivers talk on their cell phone while driv If 300 drivers…

A: Given data, p=6% =0.06 n=300 P(0.04<X<0.07)=?

Q: 68% of adults would still consider a car brand despite product/safety recalls. You randomly select…

A:

Q: Suppose that 44% of people have dogs. If two people are randomly chosen, what is the probability…

A: It is given that, 44% of people have dogs. It means, probability that a people have dogs= p = 0.44…

Q: What is the probability that 8 adults selected at random from the town all have health insurance? G

A: It is given that the random variable X i.e, health insurance follows Binomial distribution with…

Q: What is the probability he will score for the first time on his fifth shot? What is the probability…

A: Given Data Probability of success,p = 0.18 )

Q: 5. A multiple-choice quiz consists of 20 questions, each with 4 possible answers. Find the mean for…

A: A multiple choice quiz consists of 20 questions each with 4 possible answers. => P(correct…

Q: 3. In a signalized intersection, the probability of a vehicle making a left turn per time period is…

A: Let us denote X=the number of vehicles that takes left turn n=number of trials= 15 p=probability of…

Q: Construct your own table showing probability distribution using 8 data. Solve for mean, variance and…

A:

Q: Current estimates suggest that 70% of the home-based computers in a foreign country have access to…

A:

Q: 18% of all Americans live in poverty. If 35 Americans are randomly selected, find the probability…

A: It is given that  p = 18% = 0.18 n = 35 X ~ Bin( 35, 0.18 )

Q: Suppose that 20% of the cars on the road of Tashkent city are equipped with an anti-radar device.…

A: Given 20% of the cars are equipped with an anti-radar device. Sample size, n=4

Q: Michelle, a telemarketer makes six phone calls per hour and is able to make a sale on 30% of these…

A: The question is about discrete probability distribution Given : No. phone call telemarketers makes…

Q: A box contains 20 blue balls, m yellow balls and n green balls and the probability of selecting a…

A:

Q: If the probability that a randomly chosen college student takes statistics is 0.34, then what is the…

A: The probability that a randomly chosen college student takes statistics is 0.34. The probability…

Q: The national institute of mental health reports a 22% chance of an adult suffering from a…

A: Answer: From the given data, Sample size(n) = 8 P = 22% = 0.22

Q: If the Bit Error Rate (BER) in a wireless communication system in 0.5%, then find the followir side,…

A: 100 Megabytes (MB) = 838,860,800 Bits Bit Error Rate= Number of bits having error/ Total bits…

Q: Possible Number of Females in a Family of Frequency Six 3 4 2 a) Determine the total number of…

A:

Q: A card is randomly drawn from a deck of 52 card with replacement 456 times. Find the mean of the…

A: Total number of cards = 52 Number of hearts = 13 Let p = P(heart)= 13/52 = 1/4 = 0.25

Q: 1. How are the collection of all sample proportions of samples of size 172 distributed? NO 2. What…

A: Given Information: Sample size (n) = 172 studentsPopulation Proportion (p) = 0.51. The distribution…

Q: Suppose the probability of success is p=31%p=31%. What is the probability of 77 successes in 88…

A: Binomial distribution: A discrete r.v. X taking values 0,1,2,3, …., n is said to follow a binomial…

Q: The probability of a grand piano selling for more than $69,400 is 0.3258. As these pianos sell…

A: 10) Given,The probability of a grand piano selling for more than $69,400 is,P(piano sells for more…

Q: The number of death due to diabetes and kidney disease for an American during 2015 is respectively…

A: The number of death due to diabetes and kidney disease for an American during 2015 is respectively…

Q: Find the probability that exactly five green hats are drawn.

A: A bag contains three red hats, two green hats and one orange hat Eight hats will be drawn at random…

Q: Find the probability for the sample proportion of men who experience sleep apnea to be le

A: Suppose that 20% of the population of men experience sleep apnea. A random sample of n = 64 men is…

Q: You need two pieces of string at least 48 cm long for your next craft project. You have one piece of…

A: The total length of the string is 139. The total number of possible values is 139. The number of…

Q: How to find the variance of a set of numbers

A: Variance:- The amount of data values spread from the mean is known as variance.

Q: A soccer team estimates that they will score on 8% of the corner kicks. In next week's game, the…

A:

Q: If there are 7 red candies in a bag of 36 colored candies, what is the probability of getting a red…

A: Given that the number of red candies= 7 So, n(red)=7 The number of total candies= 36 So, n(all)=36…