A researcher suspects that the distribution of bacteria in drops of water follows a Poisson distribution. For each of 300 drops of water, the number of bacteria was determined. The number of drops containing given numbers of bacteria were as follows:

Number of Bacteria	Number of drops
0	175
1	75
2	25
3	12
4	7
5	4
6	2
7 or more	0

Assuming these count data follow a Poisson distribution, construct an approximate 95% confidence interval for the mean number of bacteria in a drop of water