An article describes a method of analyzing digital music files to determine the key in which the music is written.

An article describes a method of analyzing digital music files to determine the key in which the music is written. In a sample of 307 pop music selections, the key was identified correctly in 253 of them. In a sample of 347 new-age selections, the key was identified correctly in 304 of them. Can you conclude that the method is more accurate for new-age songs than for pop songs

Sam’s speech class only assesses students based on their attendance and grades on speeches. Attendance accounts for 20% of the

Sam’s speech class only assesses students based on their attendance and grades on speeches. Attendance accounts for 20% of the grade, and speeches account for 80% of the grade. Sam was in class 86% of the time, and she received scores of 100%, 83%, 75%, 94%, and 98% on her speeches.

Sam needs to get 90% or better in the class to receive an A. Sam’s overall score is
, and she
receive an A in the class.

Ground beef is packaged in small trays, intended to hold 1 pound of meat. A random sample of 30 packages

Ground beef is packaged in small trays, intended to hold 1 pound of meat. A random sample of 30 packages in the small tray produced weight measurements with an average of 1.04 pounds and a standard deviation of 0.14 pounds. (a) If you were the quality control manager and wanted to make sure that the average amount of ground beef was indeed 1 pound, what hypotheses would you test