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The average number of accidents at controlled intersections per year is 4 3 Is this average less for intersections with cameras installed The 66 randomly observed intersections with cameras installed had an average of 4 1 accidents per year and the standard deviation was 0 74 What can be concluded at the a 0 01 level of significance a For this study we should use Select an answer b The null and alternative hypotheses would be Ho Select an answer H Select an answer C c The test statistic d The p value e The p value is a f Based on this we should Select an answer the null hypothesis g Thus the final conclusion is that Please show your answer to 4 decimal places please show your answer to 3 decimal places The data suggest that the population mean is not significantly less than 4 3 at a 0 01 so there is statistically insignificant evidence to conclude that the population mean number of accidents per year at intersections with cameras installed is less than 4 3 accidents The data suggest that the populaton mean is significantly less than 4 3 at a 0 01 so there is statistically significant evidence to conclude that the population mean number of accidents per year at intersections with cameras installed is less than 4 3 accidents The data suggest that the sample mean is not significantly less than 4 3 at a 0 01 so there is statistically insignificant evidence to conclude that the sample mean number of accidents per year at intersections with cameras installed is less than 4 1 accidents h Interpret the p value in the context of the study There is a 1 58448669 chance that the population mean number of accidents per year at intersections with cameras installed is less than 4 3 If the population mean number of accidents per year at intersections with cameras installed is 4 3 and if another 66 intersections with cameras installed are observed then there would be a 1 58448669 chance that the sample mean for these 66 intersections with cameras installed would be less than 4 1 If the population mean number of accidents per year at intersections with cameras installed is 4 3 and if another 66 intersections with cameras installed are observed then there would be a 1 58448669 chance that the population mean number of accidents per year at intersections with cameras installed would be less than 4 3 There is a 1 58448669 chance of a Type I error

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