Homework 07_ Common Mistakes.pdf - Data 8 Summer 2018 Homework 07 Question Summary Answer Summary Common Mistakes 1.2 Null and Alternative for customer

# Homework 07_ Common Mistakes.pdf - Data 8 Summer 2018...

• Homework Help
• 3
• 100% (6) 6 out of 6 people found this document helpful

This preview shows page 1 - 2 out of 3 pages.

Data 8 Summer 2018 Homework 07 Question Summary Answer Summary Common Mistakes 1.2 Null and Alternative for customer who got 13 heads in 20 tosses Null: Customer had 50% chance of winning each bet Alternative: Customer had more than 50% chance of winning each bet No common mistakes 1.6 Histogram of the empirical distribution of the number of wins in 20 games Many students ran the simulation properly but did not set the bins to be representative of the distribution. The bins should have a width of one. 1.8 Using a p-value cutoff of 1%, what do you conclude? Correct conclusion based on the p-value you got. Correct explanation for comparing p-value with .01 Many students said that we “reject the alternative hypothesis” when our p-value is greater than 0.01. We should instead be saying that we fail to reject the null, since disproving the null is the point of running a hypothesis test. Some students only said what they would conclude using the p-value cutoff without referencing that actual p-value that was calculated. Some students mistook a 1% p-value cutoff for 0.1 instead of 0.01. 1.9 Is p-value the probability that the customer cheated? No, the p-value is not the probability that any hypothesis is correct.

#### You've reached the end of your free preview.

Want to read all 3 pages?

• Fall '17
• Null hypothesis, Statistical hypothesis testing, 1%, 50%, representative, 20%

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern