68.7% of the population have brown eyes. A convention has 6000 people in attendance. Find the standard deviation for the number of brown-eyed people at such gatherings of 6000 people

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Q: The simple correlation coefficients between profits (X,), sales (X,) and advertising ex- = 0.45 and ...

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Q: 1. Consumer Reports rated airlines and found that 85% of the flights involved in the study arrived o...

A: Let X = number of flights arrive on time. X ~ Binomial(n = 200, p = 0.85)  

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A: The mean of the given probability distribution is 3.15

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Q: From the data given below, find out the value of Y when X 35

A: here given data of x and y find regression line then put value of x=35 

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Q: The following set of data is from a sample of sample n=6                      7 4 9 7 3 12 a. Compu...

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Q: For the data shown, answer the questions. Round to 2 decimal places. 12.9 19.6 4 24.7 8.6 26.6 11.2 ...

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Q: Suppose x has the B(20, 0.5) distribution. Fint the P(x>10).

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Q: Obtain the median for the following frequency distribu- tion : x : 1 2 3 4 5 6 7 8 9. f: 8 10 11 16 ...

A: x Frequency (f) cf 1 8 8 2 10 18 3 11 29 4 16 45 5 20 65 6 25 90 7 15 105 8 9 114 ...

Q: 11. For a population u = 48 and o = 8, find the x value that corresponds to each of the following z ...

A: We have given that.   X~N( μ , ?^2 )   μ =48 , ? =8   Z-score =( x - μ )/?

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Q: (a) What is the support of Y? (b) Find P(Y = 2).

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Q: 1. Three Hundred digits were chosen at random from a set of tables. The frequencies of the digits we...

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Q: Suppose that X has a discrete uniform distribution on the integers 0 through 9. Determine the mean, ...

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Q: A sample analysis of examination results of 500 students was made. It was found that 220 students ha...

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Q: Each main bearing cap in an engine contains 4 bolts. The bolts are selected at random without replac...

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Q: If l represents the members living at age X in a life table, find l, values of X= 35. 20 = 512, l30 ...

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Q: Birth weights of babies born to full-term pregnancies follow roughly a normal distribution. At Meado...

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Q: CNN money reports that the average cost of a speeding ticket, including court costs, was $150 in 200...

A: We have given that  Sample size n =140 Sample mean = 153.5 Population standard deviation =15

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Q: (a) For a group containing 100 observations, the arithmetic mean and standard devia- tion are 8 and ...

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Q: .. For a distribution mean is 10, standard deviation is 4, JB, =1 and B, =4. Obtain the four moments...

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Q: Determine whether the following statements are true or false. Provide justifications afterwards. For...

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Q: Consider a random sample X1,.., X, of voters who either voted for Candidate A (“X; = 1") or for Cand...

A: The power of this test is given by, P(Reject H0 when H1 is true)=PH1(∑Xi≤c)=nCx*px*(1-p)n-x, given p...

Q: When Mitchell drives back home from campus, he has to pass through two sets of traffic lights. The p...

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Q: Marketing estimates that a new instrument for the analysis of soil samples will be very successful, ...

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Q: In a frequency distribution, the co-efficient of skewness based on quartiles is 0.5. If the sum of t...

A: In a frequency distribution, the co-efficient of skewness based on quartiles is 0.5. If the sum of t...

Q: 20.19 27.68 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 The area of the shaded...

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Q: If it costs a dollar to draw one number of a sample, how much would it cost in sampling from a unive...

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Q: . Calculate (a) R, 23, (b) R, 12 and (c) R,1, for the following data: X, = 6.8 S, = 1.0 "12 3.12 2.1...

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Q: Which of the following is true of the correlation r? It measures the strength of the straight-line r...

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Q: Fit a straight line by the method of least squares to the data given Year 2010 2011 2012 2013 Sales ...

A: Given data, X Y X*Y X*X 2010 10 20100 4040100 2011 13 26143 4044121 2012 15 30180 4048144 ...

Q: Question: A, B and C are bidding for a contract. It is believed that A has exactly half the chance t...

A: Given: A=B2 B=45 we want to find the probability for each to win the contract  

Q: For a distribution the first four moments about zero are 1, 7, 38 and 155 respectively (1) Compute t...

A: Let μi' denote the ith order raw moment. Given,  μi' = 1, μ21 = 7, μ3' = 38 and μ4' = 155