BUSINESS ADMINISTRATION
RESEARCH METHODOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a measure of difference, or spread
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describes the direction and strength of the relationship between two sets of variables
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an experiment in which neither the experimenter nor the participants know which participants received which treatment
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a graph of frequency distribution shaped like a symmetrical, bell-shaped curve; a graph of normal distribution
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Detailed explanation-1: -Variance is a measurement of the spread between numbers in a data set. In particular, it measures the degree of dispersion of data around the sample’s mean.
Detailed explanation-2: -The variance and the standard deviation are measures of the spread of the data around the mean. They summarise how close each observed data value is to the mean value. In datasets with a small spread all values are very close to the mean, resulting in a small variance and standard deviation.
Detailed explanation-3: -Variation. Quartiles are useful, but they are also somewhat limited because they do not take into account every score in our group of data. To get a more representative idea of spread we need to take into account the actual values of each score in a data set.
Detailed explanation-4: -The variance of the difference is the sum of the variances divided by the sample sizes.
Detailed explanation-5: -The variance is a measure of variability. It is calculated by taking the average of squared deviations from the mean. Variance tells you the degree of spread in your data set. The more spread the data, the larger the variance is in relation to the mean.