A sociologist was interested in the decline of racial discrimination in a particular geographical region from the 1960s to present. The number discrimination cases in this area were counted in 1960, and the average number of discrimination cases back then was approximately 110. A random sample of cities was obtained this month in the same area, and the average number of discrimination cases was approximately 47. Based on this study, is there enough evidence to suggest that discrimination has significantly declined since the 1960s?

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Q: Which data set has a larger variation? (justify your answer)

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Q: 3] Provide an example of a qualitative variable. You may not use an example provided in th notes.

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.