Which of the followings is not true for an estimator? It can be regarded as a random variable It is used to estimate a population parameter from sample data. It is a numerical measure of a summary characteristic of a population. It has a probability distribution called a sampling distribution. Suppose

Q: A random variable x has a normal distribution with mean 1000 and standard deviation 100.  Which of…

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Q: Which of the following is NOT an assumption of oneway ANOVA?   A. All populations have the same…

A: Analysis of Variance (ANOVA) :- analysis of variance id generally used for comparing more than two…

Q: An article indicates that 80% of millennials (age 18 to 29) have read a book in the last year.…

A: p = 0.80 , n = 225

Q: Suppose an experiment of a dodecagon (12-sided die) is rolled at random. • If we let X to be the…

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Q: Five individuals from an animal population thought to be near extinction in a certain region have…

A: Given, Let A be the total number of tagged animals = 5 let B be the total number of not tagged…

Q: Calculate ​P(2.5≤x≤4​). b. Determine ​P(x<3​). c. Compute the​ mean, μ​, and the standard​…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Which of the following is the observed frequencies? the product of row marginal total and column…

A: From the above question The observed frequencies  is categorical coded data that you have collecte

Q: From a certain provincial bus station, it will take a passenger between zero to fifteen minutes to…

A: X~N(0,1 ) P(X =5 ) = ?

Q: The t-distribution is a probability distribution that is used to estimate population parameters when…

A: If we have to estimate the population parameters and the sample size is greater than 30 , we use…

Q: According to a study conducted by a statistical organization, the proportion of people who are…

A: p^ = 0.74n = 100

Q: Which of the following distributions would be most likely to have a tail, and why?

A: The the data where there is a hype in the scores 7,8,9. This will give rise to a distribution like…

Q: The normal distribution is always used when the null hypothesis involves population mean.   A)…

A: Given: The normal distribution is always used when the null hypothesis involves population mean.

Q: he following table is a probality distribution for a random variable X X          -1        1…

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Q: Which of the following statement is false in a binomial distribution a. In a binomial distribution,…

A: a. In a binomial distribution, the probability of success remains constant from trial to trial The…

Q: You are the Director of Transportation Safety. You are concerned because the average highway speed…

A: Solution-: Given: n=120,μ=60,σ=12.5  We want to find, P(X¯≥62)=?

Q: A random variable X has a binomial distribution, and a random variable Y has a Poisson distribution.…

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Q: A random sample of 10 stock market mutual funds was taken. Suppose that rates of returns on the…

A: here as we know that (n-1)s2/2 follows X2 distribution with (n-1) degree of freedom

Q: If a random variable X has the gamma distribution with a=2 and B=1, find P(1.6<X<2.5).

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Q: The random variable Y has a Poisson distribution and is such that  p(0) = p(1).  What is  p(5)?…

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Q: You are given the following: • X, has a binomial distribution with a mean of 2 and a variance of 1.…

A: Given X1 has a binomial distribution with a mean of 2 and a variance of 1. Hence; E(X1)=np⇒2=np ...…

Q: Which of the following can convert a normal random variable x to a standard normal random variable?…

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Q: The following table gives the joint probability distribution of two random variables X and Y. Find…

A: Provided table gives the joint probability distribution of two random variables X and Y .  Formula…

Q: Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as…

A: Hello there! there are more than 3 sub parts in the given question. Cannot answer more than three…

Q: The chi-square distribution is described by a single parameter called the A) degree of freedom B)…

A: the chi square distribution is described by a single parameter Select the correct choice

Q: If the mean and variance of a binomial distribution with parameters (n,p) are 40 and 30…

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Q: These questions concerns the following situation.  There is a rain on a football ground.  The ground…

A: Introduction: The random variable X denotes the x-coordinate of the area in which the raindrop…

Q: Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as…

A: (i) Determine the level of significance. Correct option: Option 1.

Q: Which of the following measures how far the actual outcomes of a probability distribution deviate…

A: As per our guidelines, we are allowed to answer first question only. Thanks   We know that Skewness…

Q: Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as…

A: Given that  The Population proportion is =0.301 Sample size (n)=225 The number of first non zero…

Q: You may need to use the appropriate appendix table to answer this question. The average price for a…

A: Given: For country Aμ=3.79σ=0.25For country Bμ=3.45σ=0.20

Q: Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as…

A:

Q: Which of the following statements about sampling distributions is/are FALSE A. The mean of the…

A: The statement about sampling distribution are given.

Q: Which of the following is a characteristic of the sampling distribution of a sample mean? O a. It is…

A: The set or collection of all possible observations is defined as the population.

Q: Let T be a random variable. If E(T) = a+b0, find an unbiased estimator of 0. Is the mean- squared…

A:

Q: Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as…

A: Hey, since multiple questions are posted, we will answer first three subparts of first question…

Q: Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as…

A:

Q: Test the claim that p is more than 0.301. Use ? = 0.10 (a) What is the value of the sample test…

A: Given that Sample size n = 228 Number with leading digit 1 = 85 Level of significance = 0.10

Q: A Food Marketing Institute found that 38% of households spend more than $125 a week on groceries.…

A: (a) Obtain the distribution of sample proportion. The distribution of sample proportion is obtained…

Q: Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as…

A: Hello there! there are moe than three subparts in the question. According to our policies cannot…

Q: This is a Statistics problem.  Are the random variables Z1+Z2 and Z1-Z2 the same? Do they have the…

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Q: Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as…

A: i) a) The level of significance is α=0.05 (Since it has been not mentioned which question so, as per…

Q: Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as…

A: Answer: (i) (a)Level of significance=0.05 H0:p=0.301  vs  H1:p&gt;0.301 (b)The standard normal,…

Q: Which one of the following statements is false? A statistical hypothesis is a statement about the…

A: Hypotheses Testing: Hypotheses testing is used to make inferences about the population by using the…

Q: 3.  Which one of the following statements is false? 1. A correlation of –0.70 is weaker than a…

A: 1. If the Correlation is positive this implies that there is positive linear relationship between…

Q: One out of every 5000 individuals in a population carries a certain defective gene. A random sample…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Which of the following distributions would be most likely to have a tail, and why?

A: We have a tail formation in the data whenever there is some sort of skewness. if we consider option…

Q: Bring out the fallacy, if any, in the following statements : (a) The mean of a binomial distribution…

A: Here  For Binomial distribution  mean=np Variance=np(1-p)

Q: Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as…

A: Given n=223 sample proportion= 85/223=0.3811

Q: Which of the following statements about sampling distributions is/are TRUE? A. The mean of the…

A: Given that  Standard error = ?/√n

Q: If X does not have a normal distribution, which of the following is true about the shape…

A: This is based on central limit theorem.