Question 1
The sampling distribution of the test statistic for a goodness-of-fit test withkcategories is:
◦
approximately a chi-square distribution withk – 1 degrees of freedom.
◦
approximately a chi-square distribution withkdegrees of freedom.
◦
a chi-square distribution withk – 1 degrees of freedom.
◦
a Student’stdistribution withk – 1 degrees of freedom.
Question 2
The target grade distribution for a particular course is 10% A, 30% B, 40% C, 15% D, 5% F. Students complain that a particular professor who teaches this course grades “too hard.” The present students survey 250 former students of this professor’s class and then do aχ2 goodness-of-fit test to see if the data provide sufficient evidence to support their complaint. They find a critical value of 14.7 and a test statistic of 9.8, withα= 0.10. What is the take-away conclusion from this survey?
◦
The professor’s grades do not conform to the target.
◦
The professor’s grades conform to the target.
◦
There is not sufficient statistical evidence to reject the idea that the professor’s grades conform to the target.
◦
There is sufficient statistical evidence to reject the idea that the professor’s grades conform to the target.
Students in class
Cumulative Standard Normal Distribution
Distribution of zebra and quagga mussels in North America in 2014
Is my concept map correct? (Grade 12 Bio)
Distribution of glucose-6-phosphate dehydrogenase (G6PD) deficiency in various Jewish populations. B
The distribution of Neandertal and Denisovan DNA in the modern human genome