Practice+Final+A-Solutions

Practice+Final+A-Solutions - Practice Final A 1 What...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Practice Final A 1. What is the skew of the data represented by the below graph? Explain how you know. a. To the right. Positive. Median is way to left. Very close on left. 50% of scores spread out on right. 2. What is the skew of the data represented by the below graph? Explain how you 3. 4. 5. 6. 7. know. a. Negative to the left. Median  ­5 mean ­4.33 What is the scale of measurement of the variable “snowfall in the winter in Nevada” measured in centimeters). a. Ratio Which of the following errors refers to chance error in the measurement of an individual: standard error or probably error? No need to explain. a. Probably error You have a set of numbers and want to know the standard deviation of these numbers. Please calculate it. The numbers are: 1, 1, 5, 7, 8, 8. a. 3 If the data is strictly ordinal in nature, why is it inappropriate to measure its spread with the standard deviation? a. Because calculating the SD requires arithmetic which ordinal data doesn’t support. For questions 8 ­10 8. What is the dependent variable and what is its scale of measurement? a. Number of appropriate verbal responses. Ratio 9. Describe what one of this experiments parameters would be. a. The average number of appropriate responses (for a certain category) in the population. 10. What is an example of logical inference. a. The drug will also decrease hallucinations, delusions, etc. 11. If you divided the sum of squares by n, what would you get? a. variance 12. The whisker in a box plot has to be less than what? a. 1.5x the IQR 13. Mu is equal to what in Poisson distribution? a. variance 14 ­18. Calculate skew, kurtosis, chi squared, variance, and standard deviation for the following numbers. 1,2,3,5,5. SD ­ 1.788 VAR ­ 1.6 Skew=  ­.02519 Kurtosis= .9098 Chi ­squared= unable to calculate. (trick question!!!) ...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    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.

    Student Picture

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

  • Left Quote Icon

    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.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    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.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern