The strength of a correlation is measured by _________. Question 7 options: a correlation coefficient, which is denoted by the symbol r. a reliability value, which is denoted by the symbol r. a measure of statistical significance called a p-value, which is denoted by the symbol p. stating the results as a negative number that suggests a weak correlation or a positive number that suggests a strong correlation.In epidemiological work, the number of new cases that occur over a given period of time is called _________. Question 8 options: incidence. prevalence. ratio. estimate