In a certain​ distribution, the mean is 40 with a standard deviation of 3. At least what fraction of the numbers are between the following pair of​ numbers?   34 and 46

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Q: The following data represent the scores (in words per minute) of 25 computer encoders on a speed…

A: Class Frequency 54 - 58 2 59 - 63 5 64 - 68 8 69 - 73 1 74 - 78 3 79 - 83 5 84 - 88 1…

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Q: Compute the 65% interval estimate of ? given ? = 6.4, n=40, and ?̅= 42. a. 40.31 < µ < 42.89 b.…

A: Given Standard deviations=6.4 n=40 X-bar=42

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A: Given information: The probability mass function of a weekly demand of slow-moving product is given.

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Q: 1. A random variable that can be used to find a 0.954 confidence interval for u, the mean of the…

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Q: The lifetime of a certain brand of battery is known to have a standard deviation of 16 hours.…

A: Given that  Sample Mean \bar XXˉ = 33.133.1 Population Standard Deviation (\sigma)(σ) = 1616…

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Q: Q-3 If P(A) = 0.2, P(B) = 0.3, and P(A n B) = 0.1, determine the following probabilities: b. P(A U…

A: Given,P(A)=0.2P(B)=0.3P(A∩B)=0.1

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Q: Given: Margin of error (d)= 2.19, Confidence interval (CI) of population mean = 90%, and population…

A: Given that  Population standard deviation =5 Margin of error =d=2.19 90% confidence.

Q: In a random sample of 285 potential voters registered in the state of Iowa, 120 indicated that they…

A: Solution-: Given: n1=285,n2=266,x1=120,x2=109,α=0.10 We want to (a) Identify the hypothesis (b)…

Q: You want to prepare a 90% confidence interval for the life of a butterfly of a particular type. You…

A: Given that  Sample size n =25 Sample mean =47 Sample standard deviation =3

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A: Given digits is ,1, 6, 8, 9, 3, 7sample size(n)=6

Q: A survey of 360 college seniors found that 305 wish they had spent more time studying. Find a 94%…

A: Givensample size(n)=360x=305p^=xn=305360=0.8472confidence interval = 94%

Q: esented by the tutorial school related to the IELTS mock examination in one of the many online…

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Q: SHOW ALL WORK. EITHER WORKED BY HAND OR EXCEL FILE. The life expectancy in the United States is 75…

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Q: Let x1, X2, X3 be a random sample from an exponential distribution with mean 0. Consider the three…

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A: The Cramer’s V value is 0.20.

Q: #5.A survey organization takes a simple random sample of 625 households from a city of 80,000…

A: The question is based to find and interpret confidence interval for a popl. mean  Given : Sample…

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Q: A union of restaurant and foodservice workers would like to estimate the mean hourly wage, H, of…

A: Given: Confidence level is 99% i.e  α=0.01 Margin of error=E= 0.40  Population standard deviation is…

Q: Eiven a normally distributed population with a mean of 75 and a variance of 625, find: f) P(50 sxs…

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Q: Q1: Let x1, X2,.. ,Xn,Xn+1 be a random sample of size n + 1,n > 1, from a distribution tha N(H, o?).…

A: Given Xi~ N(μ, σ2) ; i=1,2,...,n,(n+1)

Q: In a poll of 1500 adults in July​ 2010, 780 of those polled said that schools should ban sugary…

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Q: Sixty percent of families say their children have a significant influence on their daily dinner menu…

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Q: According to a report done by S&J Power, the mean lifetime of the light bulbs it manufactures is 45…

A: Given: Sample size, n=90 bulbs Sample mean, x¯=44Population sd, σ=7

Q: Ex3\ X -- Xu id B (, ind satficient minimum sufficient

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Q: Q 4/ After collecting considerable data, the engineers decided to model the variation in s diameter…

A: Given: μ = 10.1 σ  = 2.7

Q: Hoping to lure more shoppers​ downtown, a city builds a new public parking garage in the central…

A: Solution: Given information: n= 43 Sample size  x = 128 Sample mean s= 13 Sample standard deviation

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Q: Four rowers weighing 152, 156, 160, and 164 pounds make up a rowing team. Calculate the sample mean…

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Q: The life of a butterfly is normally distributed with a mean of 50 days. You took a random sample of…

A: The provided information is µ=50 x¯=47s=3n=25α=0.05 a. The null and alternative hypothesis is…

Q: Suppose the following data were collected from a sample of 15 CEOS relating annual salary to years…

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Q: What is the 2.5th percentile in a t-distribution with a sample size of 7?     a. -2.776 b. 2.447 c.…

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Q: The rivers data set contains the length of 141 major rivers in North ica. Fit this distribution…

A: Given information: The rivers dataset is given in R – software.

Q: 2) The proportion of time, X, that a manufacturing machine is in operation during an 8-hour shift is…

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Q: The mean of a population is 75, and the standard deviation is 12. a. Size 121 random samples are…

A: Given Mean=75 Standard deviations=12

Q: An agent believes that the average closing cost of purchasing a new home is ₱328,250. She selects 40…

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Q: • What is the probability that no more than 100 individuals are hospitalized for AMI tomorrow? Round…

A: here given  on average 4 people hospitalized for AMI  λ = 4

Q: What is the 97.5th percentile in a t-distribution with a sample size of 15?     a. 2.160 b. 2.145 c.…

A: Givensample size(n)=15perccentile = 97.5

Q: only, explain which of the following forecasting method would you recommend: the Naïve method, the…

A: Naive method :  In this method last period sales is used for the next period forecast without…

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Q: The value of the sample correlation coefficient r for these data is approximately 0.728. Answer the…

A: For the given data Find Slope =? Y - intercept = ?

Q: A union of restaurant and foodservice workers would like to estimate the mean hourly wage, u, of…

A: