Two brands of tyres are tested with the following results : Life Brand of tyres in '000 miles X Y 20–25 1 0 25–30 22 24 30–35 64 76 35–40 10 0 40–45 3 0 Which brand of tyre would you use on your fleet of trucks based on coefficient of variation ?

Q: A medical student at a community college in city Q wants to study the factors affecting the systolic…

A: Given : n(sample size) =150 Line of reg. is :  y^=15.50+0.90B+1.10A                     (0.48)…

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A: It is give that slope of the regression line is –3.58.

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A: Given r=0.324

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A:

Q: The blood pressure X and the calcium levelY were measured on a random sample of 38 persons. Based on…

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A:

Q: a. Determine the correlation coefficient r between the two variables. b. Determine the slope…

A: Given :

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Q: If the mean of the data = 50 and the variance = 100 , if the data are modified through the equation…

A: Given that, mean of X, E(X)= 50 And Variance of X, V(X)= 100 Modified data, Y= 0.5X+25 E(Y)=…

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A: Note: Hi there! Thank you for posting the question. As you have posted multiple questions, as per…

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Q: For a bivariate data, the mean value of x is 53 27, the mean velue of y is 27-9, the regression…

A:

Q: Having the variation data regression line r=0.931 and the coefficient of determination is 0.867..…

A: Coefficient of determination:

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A:

Q: The engineer of large manufacturing company takes many measurements of a specific dimension of…

A: mean = 3.33 The standard deviation is given by σ = CV x x100 σ = 3.33 x 3.6100 = 0.1199

Q: Assume that you have collected cross-sectional data for average hourly earnings (ahe), the number of…

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Q: Dr.Luo did a study about the relationship between political attitudes for husbands and wives for a…

A: N=8, SP=122 The given information can be summarized into tabular form,   M SS Wives 7 172…

Q: of x = 2.882, standard deviation = 1.634  Mean of y = 2.588, standard deviation = 0.246  The…

A: Given: x¯=2.882sx=1.634y¯=2.588sy=0.246r=0.159b=0.0239intercept =2.52

Q: Table 1 reports the estimates of the effects of personal characteristics on a monthly wage. The…

A: The table of R2 is given as

Q: 7. Suppose IQ scores were obtained from randomly selected couples. For 20 such pairs of people, the…

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Q: Assuming a linear relationship between X and Y, if the coefficient of correlation (r) equal -0.30,…

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A:

Q: The mean age of children at the X College daycare center is 6. The ages are skewed in a negative…

A: μ=6 σ2= 5.1

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Q: A sample of blood pressure measurement is taken for a group of adults in those values are listed…

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A: The given data is as follows:   Systolic,xi Diastolic,yi   117 79   128 77   158 76   94…

Q: +22. The coefficient of rank correlation between the debenture prices and share prices of a company…

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Q: Suppose IQ scores were obtained from randomly selected siblings. For 20 such pairs of people, the…

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Q: You are given: Variance of X = 9 The Regression Equations are 8 X - 10 Y + 66 = 0 | 40 X – 18 Y =…

A:

Q: Imagine that there is a correlation of r = 0.65 between variable X and variable Y.  Based on the…

A: Given information r = 0.65, ZX = 1.5

Q: A regression study was done for 20 cities with latitude and average May temperature as the…

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Q: What type of analysis and descriptive statistics should be conducted to best depict the relationship…

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Q: Kon 18. For 100 students of a class, the regression equation of marks in Statistics (X) on the…

A:

Q: If the mean of the data =50 and the variance=100, if the data are modified through the equation:…

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Q: State why the median is reliable to report as the middle value of the data than the mean when there…

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.