10 obtain the appropriate test statistic from the

Info icon This preview shows pages 5–6. Sign up to view the full content.

View Full Document Right Arrow Icon
10. Obtain the appropriate test statistic. From the SPSS menus choose A nalyze and Compare M eans, followed by the appropriate test. What is the value of the t statistic and probability value on the SPSS printout? Since the value (Sig.) from Levene’s test is 0.053, equal variances can be assumed. The t value is -1.572 and the probability value is 0.123. 11. What is your decision concerning the null hypothesis? Did you reject or retain? Provide a rationale. The null hypothesis should be rejected because the significance level (probability value) is greater than 0.05 at 0.123. 12. What are some variables unaccounted for that may have impacted your results? Write this paragraph in terms of potential limitations of your results. The provided description of this research investigation is limited and does not provide a true picture of the experiment’s possible variables. The preliminary look at the details seems to show decent internal validity; however, some external influences or unknowns could impact the validity. For one, it is not known if either waitress disclosed information about the investigation to the customers.
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
6 Perhaps the waitress explained the happy face on checks. Also, the demographics (socioeconomic status) of the customer population are minimally known, only from an assumption that is concluded based on the fact that the restaurant is upscale and on a university campus. Additionally, it is not known if customers who left a smaller tip were unhappy with their dining experience prior to receiving a check due to other restaurant influences. Based on assumptions, the alternate hypothesis seems to be accurate, but should be interpreted with the understanding that assumptions were made.
Image of page 6
This is the end of the preview. Sign up to access the rest of the 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