Name:_______________________ Quiz #9 STA 261 L 1. (3 points) The following data represents the number of goals scored by four different soccer players in the local league in the first and second half of the season. 2. (4 points) To compare the effectiveness of two speed-reading programs, two groups of random people were tested. After everyone completed their reading, the reading speeds were recorded. Program 1 which is supposedly better program, yielded an average of 97 and a standard deviation of 2 from the 12 people that used it. The results from the 9 people using program 2 showed an average of 93 and standard deviation of 3. Determine at an alpha level of 5% whether Program 1 is better than program 2. 3. (3 points) From the 55 Miami students we surveyed, 29 of them think Florida will win over Ohio State. Find 99% CI for the percentage of all Miami students that think Florida will win? First Half Second half Determine a 95% confidence interval for the difference between the mean goals scored in each half of the season. Player 1 3 4 Player 2 2 1 Player 3 7 13 Player 4 2 0
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