1. True or False. Th e expected counts should be exactly equal to the observed c

Question

1. True or False. Th e expected counts should be exactly equal to the observed counts for a goodness-of-fit test? A) True B) False 2. The Poisson distribution is a discrete distribution that expresses the probability of a fixed number of events occurring in a fixed interval. For example, suppose we want to model the number of arrivals per minute at the campus dining hall during lunch. We observe the actual arrivals in 200 one-minute periods in 1 week. The sample mean is 3.8 and the results are shown below. Arrivals Frequenc 10 Total 200 32 33 A5 The probabilities based on a Poisson distribution with a mean of 3.8 are shown below. Arrivals Probability or ore How many degrees of freedom is the goodness-of-fit test statistic based on? A) 10 B) 9 C) 100 D) 81

Explanation / Answer

1) false

2)as we kow degree of freedom =nuber of categories -1 =10-1 =9

option B is correct

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