Prepare a scientific report on an experiment that has been chosen for you. Follow the instructions below:
• Watch the video of the experiment available on the e-learning portal.
• You may also download the video from the e-learning portal. After downloading it, open the video with a media player program, such as “VLC Media Player” or “Windows Media Player”. By doing this, you will be able to watch the video.
• While watching the video, you may get a message like “Experiments 1m02s — lmlOs (sYEUkhjA3r5)” or “5-Minute Crafts”. These messages are NOT part of the experiment. So, i ijoce them.
• Watch the experiment very carefully and understand it very well. This includes understanding the aim of the experiment, which should be about the “effect of something on another thing”.
• Use at least one source (electronic or printed) to interpret the results of the experiment. • Paraphrase the information you take from the source. • Reference your source at the end of your report following the APA System. • Ty’ pe your answer on the Assignment Answer Sheets, which you should download from the e-learning portal
Jan Lindhe conducted a study16 on the effect of an oral antiplaque rinse on plaque buildup on teeth. Fourteen subjects, whose teeth were thoroughly cleaned and polished, were randomly assigned to two groups of seven subjects each. Both groups were assigned to use oral rinses (no brushing) for a 2-week period. Group 1 used a rinse that contained an antiplaque agent. Group 2, the control group, received a similar rinse except that, unknown to the subjects, the rinse con-tained no antiplaque agent. A plaque index y. a measure of plaque buildup, was recorded at 4, 7, and 14 days. The mean and standard deviation for the 14-day plaque measurements for the two groups are given in the following table:
Control Group Antiplaque Group
Sample size 7 7 Mean 1.26 .78 Standard deviation .32 .32
a State the null and alternative hypotheses that should be used to test the effectiveness of the antiplaque oral rinse. b Do the data provide sufficient evidence to indicate that the oral antiplaque rinse is effective? Test using a = .05. c Bound or find the p-value for the test.
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