Which of the following statements best describes the graph of all continuous probability density functions? Select one: a. The graph is symmetric and bell-shaped ' b. The x-axis can only represent a...

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Extracted text: Which of the following statements best describes the graph of all continuous probability density functions? Select one: a. The graph is symmetric and bell-shaped ' b. The x-axis can only represent a fixed number of possible values c. The y-akis represents the frequengy that eac vaue of curs d. The area between the function curve and the x axis is always exactly 1