→ kerwinhui : chi-square goodness-of-fit... 06/23 23:25
→ kerwinhui : 先算\hat{\lambda}再算\chi^2 statistic 06/23 23:26
The owner of a car wash wants to see if the arrival rate of cars follows a
Poisson distribution. In order to test the assumption of a Poisson
distribution, a random sample of 150 ten-minute intervals was taken. You are
given the following observed frequencies:
Number of Cars Arriving in a 10-Minute Interval Frequency
0 3
1 10
2 15
3 23
4 30
5 24
6 20
7 13
8 8
9 4
Total 150
(According to Poission distribution fuction P(X=K)=exp(-λ)λ^k/k!)
Q:
1. The calculated value for the test statistic equals
a.-0.18
b. 0.18
c. 1.72
d. 2.89
2. The p-value is
a.greater than 0.1
b.between 0.05 and 0.1
c.between 0.025and 0.05
d.between 0.01 and 0.025
請問這兩題怎麼算阿...
感謝!!!
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