According to a money report by a government institution, 18-to-20-year-old college students have an average credit card balance of $569. A researcher wants to find out if this number is lower now and collects data for a random sample of 40 college students. Their average credit card debt was found to be $546 with a sample standard deviation of $67.25. Complete parts a through c. a. Using a = 0.05, does this sample provide enough evidence to conclude that the average credit card balance of 18-to-20-year-old college students has decreased since 2016? Determine the null and alternative hypotheses. H: u = (Type integers or decimals. Do not round. Do not include the $ symbol in your answers.)

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