A company is in the business of finding addresses of long-lost friends. The company claims to have a 70% success rate. Suppose that you have the names of eight friends for whom you have no addresses and decide to use the company to track them.   a) Find the mean and standard deviation of this probability distribution. What is the expected number of friends for whom addresses will be found? (Round your standard deviation to two decimal places.) ? = friends ? = friends b) What is the smallest number of names would you have to submit to be at least 96% sure that at least two addresses will be found? (Enter your answer as a whole number.) names

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

Q: A police department reports that the probabilities that 0,1,2,3 burglaries will be reported in a…

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Q: The weights of steers in a herd are distributed normally. The standard deviation is 300lbs and the…

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Q: You randomly select 25 teachers. What is the probability that their mean salary is more than $70000,…

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Q: Suppose that the heights of men in the United States are normally distributed with a mean of 65.6…

A: The mean is 65.6 and the standard deviation is 2.7.

Q: A population has a mean of 200 and a standard deviation of 25. A sample of 64 observations will be…

A: We have to find out given probabiity..

Q: SOLVE STEP BY STEP IN DIGITAL FORMAT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 3. Cables manufactured for…

A: normal distributionμ=0.13σ=0.005specification : 0.12 <x< 0.14

Q: A student takes a multiple choice exam with 10 questions, each with four possible selections for the…

A: Given that, A student takes a multiple choice exam with 10 questions, each with four possible…

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

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Q: A group of people were asked if some people see the future in their dreams. 110 responded "Yes", and…

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Q: A test is conducted in a high-risk area during a pandemic. Of the 20 people who were tested, 7 are…

A: The total number of people tested are 20. The number of positive cases are 7. The number of negative…

Q: The population average annual salary for high school teachers in Alhambra is $61,244. A random…

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Q: The probabilities that fast – food restaurant sells 10, 20, 30, 50, 100 burgers daily are 0.20,…

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Q: Find the probability that a sample of 18 has a sample mean below 32. The population mean is 24 and…

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Q: A researcher showed the mean of weights of college football players to be 200 pounds with a standard…

A:

Q: A group of statistics students decided to conduct a survey at their university to find the average…

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Q: 45% of Americans don’t know the sun is a star. The data is normally distributed.Find the probability…

A: Given data, p=45%=0.45 n=120 P(p>0.42)=?

Q: The weights of steers in a herd are distributed normally. The standard deviation is 300lbs and the…

A:

Q: Assume that the salaries of elementary school teachers are normally distributed with a mean $35,000…

A:

Q: High school girls average 80 text messages daily. Assume the population standard deviation is 15…

A: Given information:

Q: For each part below, suppose a real number is picked according to the above probability…

A:

Q: The weights of steers in a herd are distributed normally. The standard deviation is 200lbs and the…

A: From the provided information,Mean (µ) = 1000Standard deviation (σ) = 200X~N (1000, 200)

Q: The following table summarizes data on 976 pedestrian deaths that were caused by accidents. If one…

A: pedestrian intoxicated YES pedestrian intoxicated NO Total Driver intoxicated YES 64 69…

Q: Suppose the probability a patient will recover from a disease following medication is 0.7. In a…

A: Given : the probability a patient will recover from a disease following medication is 0.7.  In a…

Q: IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual…

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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 sample of 38 people are taken who who owns a red pair of shows. The std is 23 with an unlnown mean…

A: To determine the probability of making a type II error and the power, we need to know the level of…

Q: If X is a number on standard dice roll, find the standard deviation (o) of X.

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Q: Suppose that the number of hours that an adult watches in a day has a mean of 2.4 hours and a…

A: Given: i. Calculate the corresponding Z score as follows: The diagram corresponding to the mean…

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

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 62.6 ,…

Q: What is the probability distribution if X∼B(3,0.82)?

A: Given : X∼B(3,0.82)

Q: According to government data the probability that an adult was never in a museum is 11%, in a random…

A: Givenp=0.11sample size(n)=20Let "x" be the no.that were never in a…

Q: The weights of steers in a herd are distributed normally. The standard deviation is 200lbs and the…

A: Answer:- Given , The standard deviation, σ = 200lbs  The mean steer weight, μ = 1300lbs  Using…

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

A:

Q: Suppose that the value of a stock varies each day from $12.22 to $45.34 with a uniform distribution.…

A: Given that.  X ~ Uniform (12.22 , 45.34)

Q: You play a game of chance that you can either win or lose (there are no other possibilities) until…

A: Probability of losing (p) the game is 0.61 Probability of winning the game = 1- p = 1- 0.61=0.39

Q: The number of bacterial colonies on a petri dish can have an average of 2.5 per cm2 Define the…

A: Given: The number of bacterial colonies on a petri dish can have an average of 2.5 per cm.

Q: One in ten adults in a city visited a doctor last month. If a sample of 6 adults is selected…

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Q: 80% of beans seeds sprout. Three seeds were planted. Find the distribution of the variable X =…

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.