An article in Business Week says: "Today companies use a mere 40% of their space. Suppose you want to disprove this claim, suspecting that it is an...

An article in Business Week says: “Today companies use a mere 40% of their space. Suppose you want to disprove this claim, suspecting that it is an upward exaggeration. A random sample of the percentage used space for companies is 38, 18, 91, 37, 55, 80, 71, 92, 68, 78, 40, 36, 50, 45, 22, 19, 62, 70, 82, 25. Conduct the test using α = 0.05.

When the article reads that “Today companies use a mere 40% of their space.”, it means onan average.So we first calculate the average of the sample percentages given to us by adding all of...