60% of U.S. households have a personal computer.  In a random sample of 200 households, what is the probability that at least 115 have a PC?  ( hint: use the normal approximation to the binomial distribution)

Q: Clicks have found that 22% of its staff are below the age of 19. A sample of 120 customers is…

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Q: A researcher is interested in conducting a mail survey. He finds out that there is a 40% response…

A: The probability that all respond is obtained below:Here, the response rate is considered as a…

Q: use a normal approximation to find the probability of the indicated number of voters. In the case,…

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Q: he mean height of women in a country​ (ages 20−​29) is 64.4 inches. A random sample of 70…

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Q: A popular resort hotel has 400 rooms and is usually fully booked. About ​7% of the time a…

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Q: Suppose in a sample one number from a standard normal distribution, what is the probability it will…

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Q: One production process, on average, produces 1.5 percent of the waste. This production product is…

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Q: hich distribution is most strongly right-skewed?   Multiple Choice   Binomial with n = 50, π =…

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Q: A researcher is interested in conducting a mail survey. He finds out that there is a 40% response…

A: Consider X is a random variable defined as the number of responds. n is the number of people, and p…

Q: Sixty-three percent of adults in a certain country believe that life on other planets is plausible.…

A: probability mass function of B.D is = f ( k ) = ( n  k ) p^k * ( 1- p) ^ n-kwhere       k = number…

Q: Suppose z is a normal random variable. Find P ( Z > 1.84 ). Round your answer to four decimal…

A: Sketch the normal curve and shade the area to the right of z=1.84.

Q: consider a normal distribution, what probability is P(z>-25)?

A: P(z>-0.25) = 0.5987

Q: Consider a uniform distribution from 1 to 8.  What is the probability that the random variable has a…

A: From the provided information, Let X be a random variable which follows uniform distribution. X ~U…

Q: Given a binomial random variable x and p = 0.2, find the mean for a sample size of 15.

A: Given data, p=0.2 n=15 What is the mean?

Q: Use a normal approximation to find the probability of the indicated number of voters. In this case,…

A: step 1:To find the probability we'll use a normal approximation to the binomial distribution.…

Q: A consumer organization inspecting new TV sets found that 23% have one appearance defect. Suppose…

A: Given  Probability of 1 tv set getting defective appearance is 0.23.we need to determine the…

Q: A researcher is interested in conducting a mail survey. He finds out that there is a 40% response…

A: It is given that n =5 and p = 0.40.The probability mass function of binomial distribution is given…

Q: A newspaper survey found that 65% of readers found online tutorials useful. If a random sample of 9…

A: We have given that a Binomial distribution with parameters p=65% = 0.65 , q=1-p = 0.35 and sample…

Q: Pediatric asthma survey, n = 50. Suppose that asthma affects 1 in 20 children in a population. You…

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Q: Use a normal approximation to find the probability of the indicated number of voters. In this​ case,…

A: Given Information: Population proportion (p) = 0.22  Sample proportion (px) = 47/194 = 0.2422 Sample…

Q: II. The male division Male Data in inches 68 65.5 68.1 65.3 72.5 65.5 65.4 72 71.2 73.2 67.7 73.5…

A: Given that, n=32. The formula for mean and standard deviation is         mean=x¯=∑xin       standard…

Q: The mean height of women in a country​ (ages 20−​29) is 63.8 inches. A random sample of 75 women…

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Q: Use a normal approximation to find the probability of the indicated number of voters. In this​ case,…

A: The given information is that the sample of 144 eligible voters’ ages 18-24 years are randomly…

Q: Suppose XX is a normal random variable. The mean of XX  is considered a constant in the frequentist…

A: We have given that an statement. We need to tell about that it is true or false.

Q: An experiment with a probability of success given as 0.30 is repeated 90 times. Use the normal…

A: Probability of success(p)=0.30sample size(n)=90Let "x" be the no. of…

Q: In a binomial distribution, p, the probability of getting a successful outcome on any single trial,…

A: One of the properties of binomial distribution is that the probability of success must remain same…

Q: An important part of the customer service responsibilities of a cable company relates to the speed…

A: Given thatp = 0.87

Q: Past records indicate that the probability of online retail orders that turn out to be fraudulent is…

A: For binomial distribution with success probability p and size n than Mean=n*p. Standard deviation =…

Q: A researcher is interested in conducting a mail survey. He finds out that there is a 40% response…

A: The probability that none responds is,

Q: Suppose a fair coin is flipped 3000 times and counted the number of heads and tails. Using the…

A: Fair coin is flipped 3000 times and counted number of heads and tails. Probability of getting head…

Q: A drug tester claims that a drug cures a rare skin disease 72​% of the time. The claim is checked by…

A: Given,n=100p=0.72mean(μ)=np=100×0.72=72standard deviation(σ)=npqσ=100×0.72×(1-0.72)=4.48999

Q: The mean height of women in a country​ (ages 20−​29) is 64.1 inches. A random sample of 70 women in…

A: GivenMean(μ)=64.1standard deviation(σ)=2.86sample size(n)=70

Q: Which of the following probability values corresponds to values of a normal random variable within…

A: The empirical rule, also referred to as the three-sigma rule or 68-95-99.7 rule, is a statistical…

Q: Use a normal approximation to find the probability of the indicated number of voters. In this case,…

A:

Q: Consider the probability that at most 85 out of 136 DVDs will malfunction. Assume the probability…

A: Determine whether the normal curve can be used as an approximation to the binomial probability or…

Q: About 54% of people who are murdered knew the person who committed the murder. Suppose that…

A: X~Bin(n=58, p=0.54)

Q: In a normal distribution, what is the probability that a random sample of 219 with population…

A: The given sample size is 219 and population proportion is 0.17.

Q: Use a normal approximation to find the probability of the indicated number of voters. In this​ case,…

A: Answer: From the given data, Selected sample size (n) = 169 P(voted) = p = 22% = 0.22 Here n is…

Q: If z is a standard normal random variable, find the probability. The probability that z lies…

A: Answer: From the given data, If Z is a standard normal random variable, Mean(μ) = 0 Standard…

Q: A die is tossed 120 times. Find the probability that the face 4 will turn up 21 times or less,…

A: Its normal approximation to binomial distribution

Q: Use a normal approximation to find the probability of the indicated number of voters. In this​ case,…

A: Given, n = 114 p = 22% = 0.22

Q: A researcher is interested in conducting a mail survey. He finds out that there is a 40% response…

A: The probability that exactly one responds is,

Q: A fair die is rolled n = 25 times, and the outcome (1, 2, 3, 4, 5, or 6) recorded.  Review the…

A: Requirements for a binomial distridution:1)The number of observations n is fixed.2)Each observation…

Q: Past records indicate that the probability of online retall orders that tum that turn out to be…

A: Given that  n=23 , p=0.07 , q=1-p=1-0.07=0.93 X~Binomial(n=23,p=0.07) X=Number of online retail…

Q: Decide whether you can use the normal distribution to approximate the binomial distribution. If you…

A: (a)   Obtain the probability that the number of people who say auto racing is their favorite sport…

Q: Use a normal approximation to find the probability of the indicated number of voters. In this​ case,…

A:

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.