<p>I thought #6 was very confusing. For the test statistic, did you just need to calculate the variance of the readings of the thermostats, and plug it into the formula they gave you? And then use that number to calculate the p-value for chi-square?</p>
<p>That is exactly what I did. Something like between .25 and .20?</p>
<p>yeah I got the p-value to be about 0.21. For the part that asked what value for the test statistic would lead to a rejection of H0 at the 5% significance level, would you just look up the value on the table and get something around 16-17?</p>
<p>we can start discussing?</p>
<p>Yes on both of those. They post the questions at like 4pm today i think...do they also post the scoring guideline?</p>
<p>no, the english scoring guidelines haven't been posted... so idk</p>
<p>I got 16.29 for the chi sq statistic</p>
<p>Question 6, part b, you had to use 1-varstats to get "s" and then square it, and then plug in to formula?</p>
<p>Yea, and the chi square was like 16 something, so I did chicdf(X,16,9) and that came out to 76 or w/e and 1- that was the power. I put the rejection region was outside like 24 or whatever and there was not significant evidence, and the stat would of have to have been maybe 3 something (s^2) in order to reject the null.</p>
<p>how did you guys approach the problem about the hospital and the emergency room? The second question asked you to see if there was a significant difference between the two times based ONLY ON the confidence interval. What did you guys write for that? I said that the difference between the endpoints of the CI was only like....0.3 minutes, so it wasn't really significant, lol. Does that even make sense??</p>
<p>I think I said that muA=mean time of ambulance and muS=mean time of self and did the muA-muS crap. I got a confidence interval that had negative endpoints and since the interval didn't contain 0 (null hypothesis) I rejected Ho in favor of Ha and said that there was a significant difference. I'm probably wrong though....Either way, after looking at Form B questions, I'm glad about Form A....as crappy as it was.</p>
<p>aw dam I screwed myself up on the second question. How many points will I lose?</p>
<p>What did oyu guys put for 5a?</p>
<p>salinity level and the nutrients</p>
<p>Nutrient A with high saline
B with high saline
C with high saline
A with low saline
B with low saline
C with low saline</p>
<p>I was wondering if these were considered treatments as well:
Nutrient A ONLY (with natural salinity level)
B ONLY
C ONLY
No nutrients, high saline
No nutrients, low saline</p>
<p>Yeah I did the same as you did, phoenix, but maybe now im wondering if it hsould have been the six we put plus the five you thought of plus one control of no nutrients, natural salinity level. I wish they would release the scoring guide. Hopefully it's one of those "any plausible categories works."</p>
<p>PcEhAoCsE, I did the same thing for the hospital problem. Hopefully that's right.</p>
<p>I totally screwed up that experiment one. I didn't do control groups for either treatment...I didn't even realize that we had 12 tanks. Augh.</p>
<p>number 4, part b, it was statistically significant because 0 was not in the 2-SampT interval</p>
<p>Yes, vanillaextract</p>
<p>I think the ones that only manipulated one thing would be considered controls. I listed the first 6 as treatments, then in the design, I used the remaining 6 tanks for the ones with A only, B only etc</p>