A researcher is studying the average cost of traveling for a college student. As part of their research, they would like to learn more about the average yearly money spent to travel to and from home by air. In a random sample of 130 students, the mean travel cost by air was $1180 with a standard deviation of $535. Use these sample data to answer the following questions.                      What sample size would be needed to construct a 95% confidence interval to estimate the average air travel cost for a college student with a margin of error of ±$50? You will need to do calculations by hand.

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