Brach Manager of NBD bank believes the distribution of random arrivals at Woodwa

Question

Brach Manager of NBD bank believes the distribution of random arrivals at Woodward branch is Poisson and collects data to test this hypothesis. The following data represents a distribution of frequency of arrivals during one-minute intervals at the bank.

State the appropriate null and alternative of hypotheses.

Select one:

A. H0: The frequency distribution is not Poisson
Ha: The frequency distribution is Poisson

B. H0: The frequency distribution is Poisson
Ha: The frequency distribution is not Poisson

C. H0: The frequency distribution is Normal
Ha: The frequency distribution is not Normal

D. None of the above answers is correct

Explanation / Answer

Here we wnat to test whether data fit to Poisson distribution or not. So chi square test for good ness of fit will be used with following hypothesis:

H0: The frequency distribution is Poisson
Ha: The frequency distribution is not Poisson

hence, option B is correct.

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