Mathematics, 28.07.2020 20:01 syd8152

A consumer magazine wants to compare lifetimes of ballpoint pens of three different types. The magazine takes a random sample of pens of each time and records the lifetimes (in minutes) in the table below. Do the data indicate that there is a difference in the mean lifetime for the three brands of ballpoint pens?

A consumer magazine wants to compare lifetimes of ballpoint pens of three different types. The maga

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A consumer magazine wants to compare lifetimes of ballpoint pens of three different types. The magaz...