The average number of accidents at controlled intersections per year is 6. Is this average a different number for intersections with cameras installed? The 44 randomly observed intersections with...

The average number of accidents at controlled intersections per year is 6.  Is this average a different number for intersections with cameras installed? The 44 randomly observed intersections with cameras installed had an average of 7 accidents per year and the standard deviation was 1.9. What can be concluded at the  αα = 0.01 level of significance?

The null and alternative hypotheses would be:

The test statistic =

The p-value =