It is desired to test whether the number of gamma rays emitted per second by a certain radioactive substance is a random variable having the Poisson distribution with ? = 2:4. Use the following data obstained for 300 one-second intervals to test this null hypothesis at the 0.05 level of significance.
# of Gammy Rays Frequency
0 19
1 48
2 66
3 74
4 44
5 35
6 10
7 or more 4