For Exercises 4–6, do the following.
5. Speeding-Related Traffic Fatalities. The National Highway Traffic Safety Administration reports that the mean number of speeding-related traffic fatalities over the Thanksgiving holiday period from 1994 to 2003 was 202.7. We conduct a hypothesis test to examine whether the population mean number of such fatalities has decreased.
9.99.5
(a) (b) We conclude that (1) the population mean number of speeding-related fatalities is less than 202.7 when it actually is and (2) the mean number of speeding-related fatalities is not less than 202.7 when it actually is. (c) The population mean number of speeding-related fatalities is less than 202.7 when it actually is not less than 202.7. (d) The population mean number of speeding-related fatalities is not less than 202.7 when it actually is less than 202.7.