Sami Schmitt believes that number of cars 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: The number of degrees of freedom for this goodness-of-fit test is ___.

Question

Sami Schmitt believes that number of cars 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:  The number of degrees of freedom for this goodness-of-fit test is ___.

Quizplus · Accepted Answer

To find the number of degrees of freedom for a goodness-of-fit test, we need to subtract 1 from the number of categories. In this case, there are 5 categories, so the degrees of freedom for this test would be 5-1=4. Therefore, the best choice is B, with an explanation that the degrees of freedom for this goodness-of-fit test is 4.

Sami Schmitt Believes That Number of Cars Arriving at His