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Title: Psychology Statistic Homework Post by: Sportchick94 on Mar 25, 2020 Help with homework problems. Screen shot attached. Thank you
Title: Re: Psychology Statistic Homework Post by: bio_man on Mar 25, 2020 @Sportchick94 (https://biology-forums.com/index.php?action=profile;u=888063) Mind copy-pasting the question?
I'll take a look at in a bit Title: Re: Psychology Statistic Homework Post by: duddy on Mar 25, 2020 @Sportchick94 (https://biology-forums.com/index.php?action=profile;u=888063) Mind copy-pasting the question? I'll take a look at in a bit Where needed, round answers to 2 decimal places. Upon submitting your answers, you will see step-by-step instructions on how to answer each problem so you can check your work. A researcher studying genetic influences on learning compares the maze performance of four genetically different strains of mice, using eight mice per strain. Performance for the four strains were as follows: Using the .01 significance level, is there an overall difference in maze performance among the four strains? (a) Use the steps of hypothesis testing; (b) sketch the distributions involved; (c) figure the effect size for the study; (d) Test the significance of planned contrasts using the overall .05 level (with a Bonferroni correction for testing each of the five contrasts) for strain J versus strain M, (e) for strain J versus strain Q, (f) for strain J versus strain W, (g) for strain Q versus strain M, and (h) for strain Q versus strain W. Title: Re: Psychology Statistic Homework Post by: bio_man on Mar 25, 2020 Thanks... I believe you'll have to perform the ANOVA test. Does your calculator perform these types of calculations? Let's assume it does, you should get the following results, this document should help you get started. I worked on it for 20 minutes, so I hope it helps.
Title: Re: Psychology Statistic Homework Post by: Sportchick94 on Mar 26, 2020 Thank you so much!! I greatly appreciate the help since statistics is not my strongest
Title: Re: Psychology Statistic Homework Post by: Sportchick94 on Mar 26, 2020 I feel like I am still missing a few steps though
Title: Re: Psychology Statistic Homework Post by: bio_man on Mar 26, 2020 For which part?
I left some steps out intentionally because I used a calculator to find the F value and ANOVA data. Is that allowed? Title: Re: Psychology Statistic Homework Post by: Sportchick94 on Mar 26, 2020 No, I need all the steps if possible. I tried to do it myself, but I got all messed up
Title: Re: Psychology Statistic Homework Post by: bio_man on Mar 26, 2020 This one is a lot of work if it's done by hand
Okay, here's another go at it, I've shed for you a little bit more insight. Not sure how to find the Sum of Squares within without having been provided the actual data points. I tried everything to get 503, but I'm just not sure. If I figure the rest out, I'll update the thread. Title: Re: Psychology Statistic Homework Post by: Sportchick94 on Mar 27, 2020 thank you! Still a little confused, but with the information you provided I should be able to implement in some how!
So what is the cutoff? (3.34) and whats the F-ratio? Too the first uploaded picture you provided with yellow highlights, what does each of those represent? as in abbreviations Title: Re: Psychology Statistic Homework Post by: bio_man on Mar 27, 2020 Here's how you're supposed to find everything in that table. My issue still remains with the SS for within, as I don't know how to do it without data points. There is a way, I just don't know how -- this is why the calculator really helped. Once you find it, you can also find F using the formulas below
Title: Re: Psychology Statistic Homework Post by: duddy on Mar 27, 2020 To find the source of variation within without data points is easy, for this example you take (n-1) times the standard deviation raised to the power of 2:
\(SS_{within}=\Sigma \left(n-1\right)s^2\) \(SS_{within}=\left(8-1\right)\left(3.5\right)^2+\left(8-1\right)\left(4.6\right)^2+\left(8-1\right)\left(3.8\right)^2+\left(8-1\right)\left(4.9\right)^2\) \(SS_{within}=7\left(3.5\right)^2+7\left(4.6\right)^2+7\left(3.8\right)^2+7\left(4.9\right)^2\) The other ones are easy too: @bio_man, follow this: Title: Re: Psychology Statistic Homework Post by: bio_man on Mar 28, 2020 Appreciate that ^^
Title: Re: Psychology Statistic Homework Post by: Sportchick94 on Mar 28, 2020 Thank you so much!!! You both been a big help and I am very appreciative you both working to help me solve this!!
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