6. (20 points) Severe thunderstorms have been recorded at a given station over a period of 66 years. During this period, the frequencies of severe thunderstorms observed are as follows:
Determine if the annual number of severe thunderstorms follow Poisson distribution with λ=1 thunderstorm per year, at 0.05 significance level.
5. (20 points) An experiment was conducted on a new model of a particular make of automobile to determine the stopping distance at various speeds. The following data were recorded.