Statistique Et Méthodologie De La Recherche Test

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Statistique Et Méthodologie De La Recherche Test

 

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If the coefficient of determination is equal to 1, then the correlation coefficient:

2 / 60

In descriptive statistics our main objective is to:

3 / 60

In regression, the equation that describes how the response variable (y) is related to the
explanatory variable (x) is:

4 / 60

If the coefficient of determination is 0.81, the correlation coefficient:

5 / 60

In correlation both variables are always?

6 / 60

In regression analysis, the variable that is being predicted is the:

7 / 60

In the regression equation Y = a+bX, the Y is called

8 / 60

If all the values fall on the same straight line and the line has a positive slope then what will be
the value of the correlation coefficient ‘r’:

9 / 60

The total variation explained by a regression model is given by:

10 / 60

Correlation and regression are concerned with ?

11 / 60

If regression line of Y= 5, then value of regression coefficient of Y on X is:

12 / 60

In regression analysis, the variable that is doing the predicting or explaining is

13 / 60

If two variables, x and y, have a very strong linear relationship, then:

14 / 60

Positive regression coefficient indicates that the movement of the variables are in:

15 / 60

Which of the following statements regarding a researcher’s use of inferential statistics is
true?

16 / 60

Negative regression coefficient indicates that the movement of the variables are in:

17 / 60

If the correlation coefficient is 0.8, the percentage of variation in the response variable explained
by the variation in the explanatory variable is:

18 / 60

The value of the coefficient of determination (r2) ranges between

19 / 60

A scatter plot?

20 / 60

To investigate the association between two categorical variables we use:

21 / 60

The percent of total variation of the dependent variable Y explained by the set of independent variables X is measured by

22 / 60

R2 is used in regression analysis to:

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Inferential statistics enable you to :

24 / 60

If the points on the scatter diagram indicate that as one variable increases the other variable tends to decrease the value of r will be:

25 / 60

Which of the following statements is false?

26 / 60

To compare three independent means we use:

27 / 60

The term regression was used by:

28 / 60

Inferential statistics are useful for:

29 / 60

An r value of 0.80 indicates:

30 / 60

31. The value of the coefficient of correlation r lies between:

31 / 60

The mean, median, mode and standard deviation are examples of:

32 / 60

The measure of how well the regression line fits the data is the:

33 / 60

1. The method of least squares dictates that we choose a regression line where the sum of the
square of deviations of the points from the lie is:

34 / 60

My estimated regression line is Y = 17 + 4X. The intercept is equal to:

35 / 60

In simple linear regression model Y = α + βX + ε where α and β are called

36 / 60

Which part of written report that can answer the research question?

37 / 60

The signs of regression coefficients and correlation coefficient are always:

38 / 60

When the p-value is less than 0.05 we can conclude that:

39 / 60

The best fitting trend is one for which the sum of squares of error is?

40 / 60

The null hypothesis states the means are:

41 / 60

The two forms of t-test are:

42 / 60

The value we would predict for the dependent variable when the independent variables are all
equal to zero is called:

43 / 60

If all the actual and estimated values of Y are same on the regression line, the sum of squares of error will be:

44 / 60

In scatter diagram, if most of the points lie in the first and third quadrants, then coefficient of correlation is:

45 / 60

An alternative to statistical techniques for analysis of data to find patterns and trends is?

46 / 60

A measure of the strength of the linear relationship that exists between two variables is called:

47 / 60

If the points on the scatter diagram show no tendency either to increase together or decrease together the value of r will be close to:

48 / 60

If a study is “reliable”, this means that:

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Inferential statistics enable you to (Except one):

50 / 60

The regression equation always passes through:

51 / 60

In the regression equation y = bo + b1x1, b1 is the

52 / 60

Method is used to infer that the results from a sample are reflective of the true population
scores. ?

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2. A relationship where the flow of the data points is best represented by a curve is called:

54 / 60

In the regression equation Y = a +bX, a is called:

55 / 60

A process by which we estimate the value of dependent variable on the basis of one or more
independent variables is called:

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Inferential statistics is a process that involves all of the following EXCEPT:

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The graph showing the paired points of (Xi, Yi) is called:

58 / 60

A Type I error occurs when the null hypothesis is:

59 / 60

A coefficient of correlation is computed to be -0.95 means that

60 / 60

if the correlation coefficient r = 0.5 then the coefficient of determination is?

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