Answer to Question #234902 in Statistics and Probability for Muhammad bilal

Question

No. 2 [Marks: 8] According to a racing circuit designer, drivers can improve their scores by using the designer's freshly built driving course. Ten drivers are chosen at random and asked to provide their most recent score. The drivers are asked to offer their most current score after 5 races on the new circuit. Table 2 displays the results for each driver. Is there enough evidence to support the manufacturer's claim at 90% CI, assuming the driver's scores are normally distributed? Driver 1 2 3 4 5 6 7 8 9 10 Score(old) 71 86 90 70 89 78 76 88 76 80 Score(new) 72 76 76 71 80 82 80 75 76 82 Table 2