"Hector Bazaldua believes that number of customers arriving at his Scrub and Shine Car Wash follow a Poisson distribution. He collected a random sample and constructed the following
frequency distribution to test his hypothesis.
Customers per 15-min Interval
0
1
2
3
4
>=5
Observed Frequency
5
15
17
12
10
8
Conduct a chi-square goodness-of-fit test and answer the questions that follow.
a The p-value (in 4 decimal places) for the observed value of chi-square test statistic for this goodness-of-fit test is
b The expected frequency for the category of 3 customers arriving (nearest 2 decimal places) is
c Using a = 0.05, the critical value of chi-square for this goodness-of-fit test (in 3 decimal places) is"