A college professor has collected data for a random sample of 45 students. She has asked them to keep track of their total hours of paid employment for the semester, and she has also recorded each student’s semester average mark. Does it appear that there is a linear correlation between the hours of work and the average mark? Explain.
Answer to relevant QuestionsUsing the y data set (2, 4, 6, 8), evaluate Σy2. Also evaluate (Σy)2. Why are the answers different? Calculate the mean and the median for the incomes of customers in the survey of drugstore customers. Comment on the difference between the two measures of central tendency. Which one is best, and why? A statistics teacher is wondering whether there is a relationship between the marks of students in their first-year business math course, and their marks in the second-year statistics course. Calculate the appropriate ...Calculate the mean, median, mode, standard deviation, and interquartile range for this data set of ages of a random sample of people attending a local fall fair. Three women who have been friends since childhood have just graduated from college. The friends are very different, and have different abilities and skills. All three of them are trying to get jobs in the financial services ...
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