Eight randomly selected volunteers at a bowling alley were asked to bowl three games and pick their

Question:

Eight randomly selected volunteers at a bowling alley were asked to bowl three games and pick their best score. They were then given a bowling ball made of a new composite material and were allowed to practice with the ball as much as they wanted. The next day they each bowled three games with the new ball and picked their best score. At the 0.05 level of significance, did scores improve?

Bowler А в с DE F G H A Day 1 Day 2 178 176 141 174 135 190 182 141 135 153 195 151 151 183 144 158 151