tag:blogger.com,1999:blog-1832037103409526842.post8887211308563898061..comments2023-03-19T06:05:02.153-07:00Comments on Black Dragon Tea Bar: Microwave Water ExperimentBretthttp://www.blogger.com/profile/07391009406909467410noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-1832037103409526842.post-23709722667000487292012-07-31T12:28:35.209-07:002012-07-31T12:28:35.209-07:00Kudos on performing an actual statistical test. I...Kudos on performing an actual statistical test. I haven't checked your math so I'll assume your figure is correct!<br /><br />Keep in mind how to interpret p values: a p-value of 0.89 is universally interpreted as meaning that there's essentially no evidence that the effect is due to anything other than random variation. In general, you want the p-value to be small for the result to be strong. A typical "weak" p-value would be 0.05, which corresponds to data strong enough that truly random data would come out that way only about 1/20th of the time. Most hard science demands much lower p-values.<br /><br />So I'd say there's no evidence that people prefer one water over the other. There's not even a weak trend, just random variability.Alex Zorachhttps://www.blogger.com/profile/08335878680429494039noreply@blogger.comtag:blogger.com,1999:blog-1832037103409526842.post-73707629220824915482009-07-08T17:23:17.599-07:002009-07-08T17:23:17.599-07:00I performed a student's t-test on your results...I performed a student's t-test on your results and found a p-value of 0.89. The mean rating of the microwaved water was greater than kettle heated water(34.02 versus 33.33). This could indicate that in fact people lightly perfer microwave water. Might I suggest that next year you use the same tea over and over for many trials so that personal dislike of a certain tea won't influence rating. Exciting to see you doing some solid science! Love you!Nicolehttps://www.blogger.com/profile/07004519116446524751noreply@blogger.comtag:blogger.com,1999:blog-1832037103409526842.post-42910536362193017132009-07-08T15:36:02.134-07:002009-07-08T15:36:02.134-07:00You're a real scientist. What I'd like to...You're a real scientist. What I'd like to know is if you could control for how much those participants use microwaves at their own homes. If there's a lot of use there's going to be a bias there. I've never owned a microwave and have used an electric kettle for years so I'd probably prefer the kettle-heated water.Jason Witthttp://www.jasonwitt.orgnoreply@blogger.com