A particular concentration of a chemical found in polluted water has been found to be lethal to 20% of the fish that are exposed to the concentration for 24 hours. Twenty fish are placed in a tank containing this concentration of chemical in water. a Find the probability that exactly 14 survive. b Find the probability that at least 10 survive. e Find the probability that at most 16 survive. d Find the mean and variance of the number that survive.

Q: Suppose the probability of getting an "A" in a certain class is 0.22. A group of 5 friends is taking…

A: Here we want to Determine the probability that none of the friends earn an "A" in the class.

Q: please solve the following question   In the spring, a biologist and her team placed radio collars…

A: Discrete Probability distribution :  A discreet random variable X is said to be discrete probability…

Q: A mail-order company has a 9% success rate. If it mails advertisements to 500 people, find the…

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Q: A disease has a prevalence of 11%. A diagnosis has 85% probability of correctly identifying the…

A: Let D=The Person has the disease. Dc=The person doesn't have the disease. P=The person is tested…

Q: Micheal invested $2000 in a certain stock. At the end of the year the stock could be worth $1600,…

A: Given: Micheal invested $2000 in a certain stock. At the end of the year the stock could be worth…

Q: A doctor is interested in the proportion of patients which live at least 5 years after being…

A: sample size n=196proportion mean =proportion the standard deviation is ==0.028561) it follows normal…

Q: The mean weight of an adult is 62 kilograms with a variance of 144. If 195 adults are randomly…

A: Population mean=M=62 Population variance=S2=144 Population standard deviation=√S2=√144=12 Sample…

Q: A racing car is one of the many toys manufactured by Mack Corporation. The assembly times for this…

A: Mean()=55standard deviation()=4The company closes at 5 P.M every day

Q: fly will lay 402 éggs into rotting fruit. A biologist wants to see if the average will change for…

A: Given sample data is: 406, 432, 401, 410, 410, 406, 419, 412, 388, 409, 427, 405, 391, 389. Sample…

Q: The f-statistics is the variance between groups divided by the variance within groups. True False…

A: The F statistic is defined as the ratio of the two sample variances.

Q: A 10-year study conducted by the American Heart Association provided data on how age, blood…

A: Given Information:

Q: Twelve percent of U.S. employees who are late for work blame oversleeping. You randomly select four…

A:

Q: A rowing team consists of three rowers who weigh 162, 166 and 170 pounds. Fihd all with replacement…

A: Given population = 162, 166, 170 Population size = 3 Sample size = 2

Q: 4. Assume, you throw (shot) a basketball until you make the basket r times. Assume, your chance of…

A: Consider the following notations, X=number of successesp=probability of single successq=probability…

Q: A quart of Parker's milk contains a mean of 39 grams of butterfat, with a standard deviation of 2…

A: Mean = 39 Standard deviation = 2

Q: A 10-year study conducted by the American Heart Association provided data on how age, blood…

A: The independent variables are Age, Blood pressure and Smoker. The dependent variable is Risk. We…

Q: 0.72. Suppose that we randomly pick 25 daytime statistics students. In words, define the

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Q: Yi = 5,25,50,100,200.

A: Given data isYi = 5,25,50,100,200

Q: A school is sending 15 children to a camp. If 30% of the children in the school are first graders,…

A: The question is about binomial distribution Given : Randomly selected no. of children ( n ) = 15…

Q: Exhibit 6-5 The weight of items produced by a machine is normally distributed with a mean of 8…

A: Given that  Mean = 8 Standard deviation = 2 Find P(X = 8 )

Q: Four coins are tossed. Let Z be the random variable representing the number of heads that occur.…

A: Given: Four coins are tossed. The random variable Z denotes the number of heads that occurs.

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: We are given,μ = 196σ = 22n = 60

Q: Find the variance for the set of data: 27, 33, 20, 25, 25. The variance is ***

A: Solution: x x2 27 729 33 1089 20 400 25 625 25 625 --- --- ∑x =130 ∑x2 =34685

Q: Assume the probability that a maple tree at age 5 grows less than 130 cm is equal to 0.1. If the…

A:

Q: study found that 1.21% of Social Security recipients are too young to vote. If 800 Social Security…

A: Given that  A study found that 1.21% of Social Security recipients are too young to vote. P = 0.0121…

Q: A voin is tossed four times. Let x denote the number of heads. Find the mean and standard deviation…

A: A coin is tossed four times. The  denotes the number of heads.

Q: The probability that it snows in a particular city on any given winter day is 13%. What is the…

A: The probability that it snows in a particular city on any given winter day is 13%.  The number of…

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: A popular art museum in Izmir can accept 1,200 visitors a day. If this amount of traffic is…

A: We have given that  We want to use exponential distribution.  Mean = β Where  λ  = 1/β

Q: The average fruit fly will lay 424 eggs into rotting fruit. A biologist wants to see if the average…

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Q: Mundo said that 65% of those with lung cancer smokes. If he is correct, find the probability that of…

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Q: Yi = 5,25,50,100,200.

A:

Q: State the formula for Variance.

A: Equation that defines the population variance σ2=∑(X-μ)2N Here, σ2 is variance, (X-μ) is distances…

Q: Solve the problem. Assume that mountain lions' weights are normally distributed with a mean of 62.6…

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Q: Identify the population(s): All individuals who take the medication. The proportion of those who…

A: Here the population will be all the individuals who take the medication. Variable being examined for…

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: The class outing ticket includes a snack-pack with three items, a coold chocolate and then chips or…

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Q: A professor knows that her statistics students' final exam scores have a mean of 79 and a standard…

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Q: Suppose X is an outcome in throwing a fair die. Find the mean and variance

A: Given X is an outcome in throwing a fair die and we want the mean and variance.

Q: A different investor decides to invest $8000 in Fund A and $3000 in Fund B. Assuming the amounts…

A: Here's how to proceed:### 1. Investment DetailsYou've mentioned investments of $8000 in Fund A and…