In a recent year, customers of Victoria Fridge and Stove (which is open 7 days a week) returned 146 appliances. If the frequencies of returns on different days conform to a Poisson distribution, they will be as shown on the bottom row of the following table. (For example, on about 245 days there will be no returns at all.) Use a 0.05 significance level to test the claim that the actual frequencies fit a Poisson distribution. (Caution: Not all of the expected frequencies are at least 5, as assumed by the hypothesis test.)
Number of returns on that day 
0 
1 
2 
3 
4 
Actual number of days 
247 
90 
24 
3 
1 
Expected number of days 
244.7 
97.9 
19.6 
2.6 
0.2