first four moments of distribution about the value 5 of the 10 and 15. Describe the nature of skewness of this variabl

Q: Assume the random variable x is normally distributed with mean u= 82 and standard deviation a =5.…

A: From the provided information, Mean (µ) = 82 Standard deviation (σ) = 5 X~N (82, 5)

Q: Use the formula to find the standard error of the distribution of differences in sample means,…

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Q: z-score that has 73.6​% of the​ distribution's area to its right.

A: To find the z value, use the standard normal table to find the z-score which cuts off an area of…

Q: 4. For X bar = 55.00 and S = 7.00, between what two values do %3D approximately 95% of the cases lie…

A: Note: As per the guidelines, only first question of this file has been solved. 4. Given data: Mean,…

Q: d) Due to the symmetry of the normal distribution we know that P(X > 30) = P(X <

A: Givenμ=42σ=6Let "X"=length(in cm) of an eel

Q: 2. Since the mean is computed from individual observed values, each of which contains an error, the…

A: Formula is given below.

Q: find the z-score that has 30.5% of the distributions area to its left.

A: From the given information, PZ&lt;z=30.5%⇒PZ&lt;z=0.305

Q: given a normal distribution with mean of 50 and standard deviation of 10 find: A)the normal curve…

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Q: find the standard deviation correct to 3 significant figures, and hence show that about 2.7% of the…

A: Here AS PER POLICY I HAVE CALCULATED 3 PARTS ONLY Here for each z score use normal table

Q: The coefficient of variation of twwo distribution are 50,60. There A.M are 30,25 the D =? difference…

A:

Q: What type of distribution should be used? Oz Ot Other If Mr. Gomez wants to be 95% confident, what…

A: The provided information is  x¯=338σ=10n=40α=0.05 In the given problem the population mean and…

Q: The first four moments of a distribution about x=2 are 1, 2.5, 5.5 and 16. Calculate the four…

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Q: Assume the random variable X is normally distributed with mean u = 50 and standard deviation o = 7.…

A:

Q: Find the z-score for which 80% of the distribution's area lies to its right.

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Q: Suppose that X-bin(75,0.2). Using the normal approximation to the binomial distribution, P(14.< X <…

A: Given,n=75p=0.2mean(μ)=np=75×0.2=15standard deviation(σ)=np(1-p)σ=75×0.2×0.8σ=3.4641

Q: The heights of students from a certain school are normally distributed wit mean 106 cm and standard…

A: Given data,μ=106σ=8P(X&lt;x)=25.14%P(X&lt;x)=0.2514

Q: Find the​ z-score that has 93.82​% of the​ distribution's area to its left.

A: given probability is P(Z&lt;z0)=0.9382

Q: Ex8: Assume that the current measurements in a strip of wire follow a normal distribution with a…

A: Assume that the current measurements in a strip of wire follow a normal distribution.

Q: A normal distribution has a mean of mu = 80 with o = 20. What score separates the lowest 30% of the…

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Q: Find the prob that the device does not faul before 17.6 days The gamma distribution with shape…

A: From the given information, the gamma distribution with shape parameter 5 and mean 11 of the time…

Q: Suppose the service time, in minutes, at a bank has the Exponential distribution with 2 = 1/2.…

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Q: The first four moments of a distribution about the origin are 1, 4, 10 and 46 respectively. Obtain…

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Q: Because the leading digits of inter-arrival traffic times the distribution described by Benford's…

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Q: A vertical line drawn through a normal distribution at z = -0.72 separates the distribution into two…

A: Given :  A vertical line drawn through a normal distribution at z = -0.72 separates the distribution…

Q: The first four moments of a distribution about the arbitrary point 4 are 1, 4, 10 and 45…

A: From the given information, The first four moments of a distribution about the arbitrary point 4 are…

Q: c) The probability that a score is greater than 200 is (Round to four decimal places as needed.) d)…

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Q: Explain a situation in which the criteria for using the approximation would be met, ie. np ≥ 5 and…

A: Ans .  The mean μ of a binomial = np. The standard deviation of a binomial = √np(1−p) For a normal…

Q: For mesokurtic distribution, the first moment about 7 is 23 and the second moment about origin is…

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Q: Find the z-score for which the two-tail probability that falls more than z standard deviations from…

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Q: What proportion of the normal distribution is found in the folloing areas? a. Between the mean and…

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Q: he mean eggshell thickness for quail eggs that are 15 mm in length? um he mean eggshell thickness…

A: Given:- y = 0.185 +0.007x and that sigma= 0.005.

Q: Consider random samples of size 50 from a population with proportion 0.80 . Find the standard error…

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Q: The first three moments of a distribution about the value 7 , calculated from a set of 9…

A: Given The first three moments of a distribution X about 7 EX-7=0.2EX-72=19.4EX-73=-41 Simplifying…

Q: A researcher measured how far 100 students from York (mean = 30 kilometers, SD = 5.2 kilometers) and…

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Q: Assume the randorm variable x is nonmally distributed with mean p= 90 and standard deviation o=5.…

A: GivenMean(μ)=90standard deviation(σ)=5

Q: Compared to the z distribution, the t distribution has a shorter peak and fatter tails. In the t…

A: Z-distribution vs t-distribution

Q: The first four moments of a distribution about the value 4 of the variable are-1.5, 17, -30 and 108.…

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Q: A vertical line is drawn through a normal distribution so that 17.36% of the distribution is located…

A:

Q: I want my estimate to be accurate, I want the error of pN to be small. How many people should I poll…

A: Given that - Suppose you want to find out how many people support Policy X. A standard polling…

Q: Assume the random variable X is normally distributed with mean u = 50 and standard deviation o = 7.…

A:

Q: Assume the readings on thermometers are normally distributed with a mean of0degreesC and a standard…

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Q: The time to failure of a very sensitive part follows a Weibull distribution with a = 1 hou Calculate…

A: We want to the probability and  X~Weibull distribution(α=1,β=1)

Q: Assume the readings on thermometers are normally distributed with a mean of 0°C and a standard…

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Q: The time (in minutes) it takes Greg to complete a homework problem is uniformly distributed…

A: X=Time it takes to complete a homework problem X~Ua,bwhere, a=15 and b=28hence, X~U15,28

Q: For a chi-squared distribution, find xố 025 when v= 25. Click here to view page 1 of the table of…

A: Given : Degree of freedom, df = 25 significance level, (α) = 0.025

Q: The mean and varlace of a binomial distribution is 3 and 9/4 respectively, find a) Value of n b)…

A: Solution: 3. From the given information, the mean and variance of a binomial distribution is 3 and…

Q: Find the​ z-score that has 62.2​% of the​ distribution's area to its right

A: P(Z&gt;z)=62.2% P(Z&gt;z)=0.622 z=?

Q: The elongation of a steel bar under a particular load has been established to be normally…

A: The formulae for z-score is given by                                     z = X-μσ where μ is the…

Q: Find the value of t for the t distribution with a sample size of 30 and area in the right tail equal…

A: Given, n=30 df=n-1=29 alpha=0.025 The t critical value for  sample size of 30 and area in the right…

Q: For a distribution, the mean is 10, variance is 16, y, is + 1 and B, is 4. Obtain the tirst tour…

A: Given that, for a distribution,  the mean is 10, variance  is 16, γ1 is +1 and β2 is 4. We need to…