1-What is data analysis?  How does it apply in the context of safety assurance?2-Explain what is meant by “central tendency”.  Give three examples of measures of central tendency.3-What is validity and why is it important?4-What is the difference between a mean and a median?5-The distribution of IQ scores in the United States follows a normal, or bell-curved distribution where the mean value is 100.If I told you that you had an IQ of 102, is that a compliment?  Why or why not?

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