/143
538

Statistiques Et Méthodologie De La Recherche Preparation (Dr. Tok Bunkea)

 

1 / 143

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

2 / 143

2) To investigate the association between two categorical variables we use:

3 / 143

3) Which of the following are examples of continuous variables?

4 / 143

4) Inferential statistics are useful for:

5 / 143

5)

If one item is fixed and unchangeable and the other item varies, the correlation coefficient will be:

6 / 143

6) Inferential statistics enable you to :

7 / 143

7)

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

8 / 143

8) R2 is used in regression analysis to:

9 / 143

9) To compare two means we use:

10 / 143

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

11 / 143

11)

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

12 / 143

12) In the regression equation Y = a + bX, where a and b are called:

13 / 143

13) The strength (degree) of the correlation between a set of independent variables X and a dependent variable Y is measured by

14 / 143

14) Internal “validity” refers to:

15 / 143

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

16 / 143

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

17 / 143

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

18 / 143

18) The difference between regression analysis and correlation analysis is (except one):

19 / 143

19) The purpose of simple linear regression analysis is to:

20 / 143

20)

When the ratio of variations in the related variables is constant, it is called:

21 / 143

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

22 / 143

22) If the value of regression coefficient is zero, then the two variable are called:

23 / 143

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

24 / 143

24) The term regression was used by:

25 / 143

25)

If both variables X and Y increase or decrease simultaneously, then the coefficient of correlation will be:

26 / 143

26) When there is no linear correlation between two variables, what will the value of r be?

27 / 143

27) The most commonly used formula to describe linear relationship is?

28 / 143

28) To compare three independent means we use:

29 / 143

29) Scatter diagram is considered for measuring :

30 / 143

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

31 / 143

31) The correlation coefficient is used to determine:

32 / 143

32) In descriptive statistics our main objective is to:

33 / 143

33) The null hypothesis states the means are:

34 / 143

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

35 / 143

35)

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

36 / 143

36) The coefficient of determination (sometimes known as the regression coefficient) enables you to:

37 / 143

37) A statistical technique that develops an equation that relates a dependent variable to one or
more independent variables is called:

38 / 143

38) In simple regression equation, the numbers of variables involved are:

39 / 143

39) An example of an experimental study is a(n):

40 / 143

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

41 / 143

41) The coefficient of correlation

42 / 143

42) If the correlation coefficient is a positive value, then the slope of the regression line:

43 / 143

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

44 / 143

44) In simple linear regression, the numbers of unknown constants are:

45 / 143

45) If the slope of the regression equation y = bo + b1x is positive, then

46 / 143

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

47 / 143

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

48 / 143

48)

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:

49 / 143

49)

The sum of the difference between the actual values of Y and its values obtained from the fitted regression line is always:

50 / 143

50) A Type I error occurs when the null hypothesis is:

51 / 143

51) A procedure used to select a sample of n objects from a population in such a way that each
member of the population is chosen strictly by chance, each member of the population is equally
likely to be chosen, and every possible sample of a given size, n, has the same chance of selection
is known as:

52 / 143

52) Which of the following statements is true regarding a sample?

53 / 143

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

54 / 143

54) When the two regression lines are parallel to each other, then their slopes are:

55 / 143

55) Scatter diagram helps us to :

56 / 143

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

57 / 143

57) Computers are essential for quantitative data analysis because?

58 / 143

58) Which of the following requirements for a scientific report writing may depend on your
institution (EXCEPT ONE)?

59 / 143

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

60 / 143

60) The mean of a sampling distribution of a sample statistic is called :

61 / 143

61) Two variables have a positive association when?

62 / 143

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

63 / 143

63) When the p-value is greater than 0.05 we can conclude that:

64 / 143

64) The coefficient of determination (r2) is

65 / 143

65) If the Pearson Correlation Coefficient shows zero value, it means that:

66 / 143

66) In the regression equation y = bo + bx, bo is the

67 / 143

67) Bivariate Data are the data collected for :

68 / 143

68) The null hypothesis states the means are:

69 / 143

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

70 / 143

70) If all the plotted points in a scatter diagram lie on a single line, then the correlation is :

71 / 143

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

72 / 143

72) The straight line graph of the linear equation Y = a + bX, slope will be downward If:

73 / 143

73) Which Statistical software come with appropriate table, graph, and/or chart-building
features to easily convert tabular data into a variety of formats.?

74 / 143

74) In regression analysis, the variable that is being predicted is

75 / 143

75) The predicted rate of response of the dependent variable to changes in the independent variable
is called:

76 / 143

76) In correlation both variables are always?

77 / 143

77) Inferential statistics enable you to :

78 / 143

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

79 / 143

79) A t-test is used to compare:

80 / 143

80) 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:

81 / 143

81) Let the coefficient of determination computed to be 0.39 in a problem involving one independent variable and one dependent variable. This result means that

82 / 143

82) If the value of any regression coefficient is zero, then two variables are:

83 / 143

83) 51. What is the slope of the line y = -3.4x – 2.5?

84 / 143

84) If Y = 2 – 0.2X, then the value of Y intercept is equal to:

85 / 143

85)

If the two series move in reverse directions and the variations in their values are always proportionate, it is said to be:

86 / 143

86) A scatter plot?

87 / 143

87) What does it mean when you calculate a 95% confidence interval?

88 / 143

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

89 / 143

89) A scatterplot is a ?

90 / 143

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

91 / 143

91) A discrete variable is:

92 / 143

92) If the plotted points in a scatter diagram lie from upper left to lower right, then the correlation
is :

93 / 143

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

94 / 143

94)

When regression line passes through the origin, then:

95 / 143

95) A qualitative variable:

96 / 143

96) All data points falling along a straight line is called:

97 / 143

97) The step in the data analysis process is (EXCEPT ONE):

98 / 143

98) The coefficient of determination, r2, indicates:

99 / 143

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

100 / 143

100) The two forms of t-test are:

101 / 143

101) Quantitative data refers to:

102 / 143

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

103 / 143

103) The signs of regression coefficients and correlation coefficient are always:

104 / 143

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

105 / 143

105) Correlation analysis is used to:

106 / 143

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

107 / 143

107) The straight line graph of the linear equation Y = a + bX, slope is horizontal if:

108 / 143

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

109 / 143

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

110 / 143

110) In regression analysis, if the independent variable is measured in kilograms, the dependent
variable:

111 / 143

111) Correlation and regression are concerned with ?

112 / 143

112) Which of these is not one of the four main reasons for missing data?

113 / 143

113) If a researcher conducts a study in which the reading ability of a class of 20 second graders is
tested at the beginning and at the end of the year, the appropriate statistical procedure to
analyze the results would be:

114 / 143

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

115 / 143

115) If there is a very strong correlation between two variables then the correlation coefficient must
be:

116 / 143

116) A perfect positive correlation is signified by:

117 / 143

117) An r value of 0.80 indicates:

118 / 143

118) Inferential statistics enable you to (Except one):

119 / 143

119) Which of the following statements is false?

120 / 143

120) If you have 20 pairs of subjects what would be the degrees of freedom for a test of correlation
between the groups of scores?

121 / 143

121) If the plotted points in a scatter diagram are evenly distributed, then the correlation is :

122 / 143

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

123 / 143

123)

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:

124 / 143

124) Relationship between correlation coefficient and coefficient of determination is that?

125 / 143

125) If two variables have a correlation coefficient of .30, what percentage of one variable is
accounted for by the other variable?

126 / 143

126) Because of the possibility of error in sampling from populations, researchers use:

127 / 143

127) 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’:

128 / 143

128) Which of the following statements is true?

129 / 143

129) The slope of the regression line of Y on X is also called the:

130 / 143

130) The regression equation always passes through:

131 / 143

131) Correlation analysis aims at :

132 / 143

132) The coefficient of determination is the?

133 / 143

133) The correlation coefficient, r, can take on any value within what range?

134 / 143

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

135 / 143

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

136 / 143

136) The degree of linear association between two metric scaled variables is measured by:

137 / 143

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

138 / 143

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

139 / 143

139) When correlation coefficient is 1, all the points in a scatter diagram would lie?

140 / 143

140) The range of regression coefficient is:

141 / 143

141) The arithmetic mean of the two regression coefficients is greater than or equal to:

142 / 143

142) The dependent variable is also called except one:

143 / 143

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

Your score is

The average score is 84%

0%

Any comments?