1. A \"best-fit\" mathematical equation for the values of two variables, r and y

Question

1. A "best-fit" mathematical equation for the values of two variables, r and y, is called A. correlation amalysis B. scatter diagram. C. regression analysis D errors of prediction 2. A random sample of males and females involved in rear end accidents results in the following Minitab TRMEAN STDEV SEMEAN 38 9.77 1.70 967 .57 LES 33 2391 2000 38 28.87 28.S0 28.44 What is the value of the test statistic (Z score)? A-496 B. 1.64 C.-2.14 D. 2.32 3. The object on which the response and factors are observed is called A. treatments B. factor level C. factors D. experimenal unut the following statements are nae regarding the simple laear regression model», , + + e,n A. y, is a valoe of the dependent vanable d is a value of the independent vanable ( B. , is a nourandon error C. Po is the slope of the regression lise D. , is the y-intercept of the regression line 5. With larger and laager numbers of categories in ci-square tests, the chi-square distrnbution takes on the shape of the A. binoniial B. C. Pousson D. sormal 6. In testing the difference berween two population means using two independent samples, we use the

Explanation / Answer

Solution:

1.(C) Its answer is C i.e. Regression analysis. a best-fit mathematical equation for the values of two variables x and y is called regression equation which are as follows:
Y= a+bx

where Y is dependent Variable and X is independent Variable.

3(D):

An experiment unit is the object on which the responses and factors are observed

4(a):

Its answer is A i.e. In regression model:
Yi= a+bxi +ei

Yi is the value of dependent variable y and xi is the value of independent variable X.

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