Primary data refers Select one: O a data published by an organization that has collected it data published by an organiz
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The weighted average of the possible values that a random variable x can assume, where the weights are the probabilities of occurrence of those values, is referred to as the: Select one: O a variance. O b. standard deviation. Oc. expected value. O d. covariance. C 10 a
Which of the following graphical display can be used to describe relationship between two numerical (quantitative) variables? Select one: O a. A scatter diagram Ob. A histogram. O c. A bar chart. Od A pie chart
The frequency of new car models introduced by a particular car manufacturing company for each of four years is given in the following table. Year 2005 2006 2007 2008 Frequency 4 6 5 9 Which of the following is the relative frequency of new models in 2007? Select one: O a 50% O b. 5% Oc. 62.5% O d. 20.8%