Statistique Et Méthodologie De La Recherche Test

A Type I error occurs when the null hypothesis is:

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

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

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

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

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

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

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

Which of the following statements is true regarding a sample?

To compare three independent means we use:

The signs of regression coefficients and correlation coefficient are always:

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

Which of the following statements is false?

An r value of 0.80 indicates:

The two forms of t-test are:

A perfect positive correlation is signified by:

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

The range of regression coefficient is:

The coefficient of determination is the?

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

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

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

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

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

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

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

Scatter diagram is considered for measuring :

Correlation and regression are concerned with ?

Inferential statistics are useful for:

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

In descriptive statistics our main objective is to:

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

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

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

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

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

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:

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

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

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

Bivariate Data are the data collected for :

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

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’:

To investigate the association between two categorical variables we use:

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

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

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

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

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

The null hypothesis states the means are:

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

Scatter diagram helps us to :

The dependent variable is also called except one:

Internal “validity” refers to:

The null hypothesis states the means are:

A scatterplot is a ?