Hypothesis testing for mean you must show your work:
- clearly state the sample mean, significance level, population, or sample standard deviation
- clearly state the null hypothesis and alternative hypothesis
- clearly state the test statistics and p-value
- state if the significance test says you should reject the null hypothesis for the alternative or not.
- clearly state your conclusion

the average number of accidents at controlled intersections per year is 4.7. is this average more for intersections with cameras installed? the 46 randomly observed intersections with cameras installed had an average of 4.9 accidents per year and the standard deviation was 0.71. what can be concluded at the = 0.10 level of significance?
a. for this study, we should use select an answer the null and alternative hypotheses would be: ?