Chi-Square and t-Tests


Chi-Square and t-Tests in SPSS


Having grown tired of working with rats, a group of ambitious researchers genetically engineered super-hamsters.  They discovered a way to create hamsters in all colors of the rainbow.  Taking a subsample of 40 colorful hamsters (red, yellow, green, and blue), the researchers randomly assigned the hamsters to a treatment or control group.  The treatment group had a bioluminescence gene added to their DNA sequence, which caused them to glow in the dark.  The researchers hypothesized that this would affect the hamster’s self-esteem, such that the glowing hamsters would exhibit more self-confidence due to their fantastic appearance, and thus would complete a maze faster than hamsters who could not bioluminesce. Prior to the “big race”, the researchers gave the hamsters some practice runs in the maze (round1 and round2) where scores represent how long it took the hamsters to successfully complete the running of the maze.  The data file “hamsterdata.sav” contains 7 variables:

ID – identification numbers assigned to the hamsters

Treat – Treatment = 1/Control = 0 assignment

Color – red, yellow, green, or blue

Weight – Hamster’s weight in ounces

Time – time to complete the maze in the “big race”

round1 – time to complete the maze in the first practice run

round2 – time to complete the maze in the second practice run

1.     Your first hypothesis has to do with whether hamsters of each color occur with equal frequency.  Test this hypothesis using a Univariate Chi-Square test to determine if certain colors are more common than others. What do the results indicate? Report the results in APA style and also interpret the results in terms of what this means for color frequencies.


2.      When the researchers were deciding which hamsters to give the special bioluminescent gene to, did they discriminate based on color?  If they did, there should be a significant association between treat and color.  Test this hypothesis by conducting a Bivariate Chi-Square test. Was there a significant association? Report the results in APA style and also interpret the results in terms of the relationship between the two variables.


3.      Your next research question involves the variable weight.  You know that in the population, the average hamster weight (µ) = 4 ounces. Test the hypothesis that the average weight in this sample of hamsters is different than the population average of 4 ounces using a Single Sample t-Test.  What do you conclude? Report the results in APA style. Are these hamsters generally heavier, lighter, or the same weight as average-sized hamsters?


4.      Does the addition of the bioluminescent gene really increase hamster self-esteem, thus making them complete the maze faster?  Using treat as your grouping variable, conduct an Independent Samples t-Test on time.  Report the results in APA style. What do you conclude about the effect of the gene on time?


Finally, did the practice runs help the hamsters finish the maze faster?  Conduct a Dependent (Paired) Samples t-Test on round1 and round2 scores to determine if the hamsters ran the maze faster in the second practice round.  Report the results in APA style. What do you conclude about the practice runs?

Calculate the price of your order

Simple Order Process

Fill in the Order Form

Share all the assignment information. Including the instructions, provided reading materials, grading rubric, number of pages, the required formatting, deadline, and your academic level. Provide any information and announcements shared by the professor. Choose your preferred writer if you have one.

Get Your Order Assigned

Once we receive your order form, we will select the best writer from our pool of experts to fit your assignment.

Share More Data if Needed

You will receive a confirmation email when a writer has been assigned your task. The writer may contact you if they need any additional information or clarifications regarding your task

Let Our Essay Writer Do Their Job

Once you entrust us with your academic task, our skilled writers embark on creating your paper entirely from the ground up. Through rigorous research and unwavering commitment to your guidelines, our experts meticulously craft every aspect of your paper. Our process ensures that your essay is not only original but also aligned with your specific requirements, making certain that the final piece surpasses your expectations.

Quality Checks and Proofreading

Upon the completion of your paper, it undergoes a meticulous review by our dedicated Quality and Proofreading department. This crucial step ensures not only the originality of the content but also its alignment with the highest academic standards. Our seasoned experts conduct thorough checks, meticulously examining every facet of your paper, including grammar, structure, coherence, and proper citation. This comprehensive review process guarantees that the final product you receive not only meets our stringent quality benchmarks but also reflects your dedication to academic excellence.

Review and Download the Final Draft

If you find that any part of the paper does not meet the initial instructions, send it back to us with your feedback, and we will make the necessary adjustments.