With explain

Are you picky about the toilet paper you buy? Mr. Welshons is! To investigate the absorbency power of his favorite brand of toilet paper he went to the store and randomly selected (and purchased) 18 single rolls. He then poured 1/4 cup of water onto a hard surface and counted how many individual squares of toilet paper it took to completely absorb the water. Here are the results from his 18 rolls: 29: 20 25 29 21 24 27 25 24 29 24 27 28 21 25 26 22 23 (a) [4 pts] Is there convincing evidence at the a = 0.05 significance level that this brand of toilet paper will require less than 26 squares to absorb 1/4 cup of water