1. What are the assumptions for conducting a paired or dependent samples t-test in this study?
Which of these assumptions do you think were met by the Lindseth et al. (2014) study?
Distribution of scores are normal or approximately normal, dependent variables are
measured at interval and ration levels, repeated measures data or collected from one group
of subjects resulting in paired scores, differences between the paired scores are different.
In this study I believe the assumptions were met except for #1 the distribution of scores
were not normal
2. In the introduction, Lindseth et al. (2014, p.187) described a “2-week washout between diets”.
What does this mean? Why is this important? The washout time frame would be time to be
cleaned out of the high dose aspartame of the 1st 8 days of the study. This would allow
more accuracy of the 2nd 8-day study results and prevent a biased sample
3. What is the paired t-test for mood (irritability) between the participants’ consumption of
high- versus low-aspartame diets? Is this result statistically significant? Provide a rationale for
your answer. The paired t-test value for mood (irritability) is 3.4. The result is statistically
significant because p-value is <0.01 per table 2 @ 0.002.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Angelicer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $6.49. You're not tied to anything after your purchase.