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The data in the table below, which report the counts of the number of alpha particles in the 2612 different intervals.
Num
0
1
2
3
4
5
6
7
8
9
10
11
12
>12
total
Freq
57
203
383
525
532
408
273
139
49
27
2612
It was suggested that the number of particles in a randomly selected interval might follow a Poisson distribution. Assuming a Poisson distribution to be an appropriate model for the data, use two methods to find an approximate 95% confidence interval for the mean of this distribution.
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