Null hypothesis

Investigating the effect of cannibalism on light tolerance In this experiment, these people tested whether light tolerance could be transferred through chemical compounds in a species of flatworms. This idea was based off the fact that flatworms could apparently still have memories even if cut in two. What these people wanted to investigate was whether certain "memories" or acquired traits could be retained in a dead worm cut in half and transferred to another worm without the trait being lost.…

blood pressure of a patient before and after giving insulin. Insulin is typically given to patients that have diabetes. The dependent t-test can measure the level of blood sugar in the body. The null hypothesis for the dependent t-test is that there is no difference between the two scores. The research hypothesis for the dependent t-test is that there is a difference between the two groups.…

What hypothesis is being tested? hypotheses: first, students who report LD or ADHD would be victimized more frequently compared with students who do not report LD/ADHD diagnoses; second, students with less secure attachment styles to parents would experience more victimization compared with students with better attachment to parents; third, students with insecure attachment style to teachers would experience more frequent victimization compared with students with more secure attachment to…

a method to statistics. Not necessarily that it should be overly formalized or technical, but one with sound judgement. Abelson argues that good judgement with statistics in social science has been lost because there is considerable focus on null hypothesis testing (Abelson, 2). Statistical results that are shared should always be prefaced with a context and be provided with comparison groups. Also, it should never be the case for researchers to come up with an absolute conclusion once a model…

adequate amount of to justify the increased operating costs. Acknowledged as the other opposite hypothesis, the null hypothesis is the rejection or disapproval of the other hypothesis. We work to come up with an alternate hypothesis that helps explains a phenomenon and then set out to disapprove the null hypothesis. The null hypotheses are not interrupted as a statement that is null itself. Instead, the null hypotheses are commonly assumed to be true pending data indicates…

After the data was collected it was formulated into 4 tables relating to Alpha Amplitude, Alpha Frequency, Beta Amplitude and Beta Frequency, the tables can be found in the appendix section below. The tables contain ID numbers to identify the volunteers as well as columns to show the amplitude (μV)/frequency (Hz) of alpha and beta during the four periods of no music (NM1, NM2, NM3, NM4),CL, CH, RL and RH. The percentage increase for all the different types of music compared to no music was…

whether or not the means differ significantly. From a t-test a null hypothesis can be determined. The null hypothesis for this study is the mean number of species found within the lawn and the prairie are the same, while the alternative hypothesis states that the mean number of species found within the lawn and the prairie are not equal. As determined by the p-value of 0.007434, for a two-tail t-test, one should reject the null hypothesis and accept…

a major, 20% choosing Marketing, and 10% are undecided. Conducting a Chi-Square Goodness of the Fit Test revealed that the class of 200 students does not fit the historical pattern when using a .05 significance level. Therefore, rejecting the null hypothesis. One must establish a comprehension of Chi-Square Testing. The Chi-Square Goodness of Fit Test are calculations done on categorical data.…

ANOVA showed no significant difference between practice time (< 15 hours, 15 – 25 hours, > 25 hours) and the time to complete a 100-yard freestyle, F (2, 33) = 0.160, p = 0.853. Because of this, the post-hoc test was not needed. We fail to reject the null. The practice time is not associated with time to complete 100-yard free-style in this sample. 7. When would you use a factorial ANOVA rather than a simple ANOVA to test the significance of the difference between the averages of…

Statistical Research An interesting topic to study would be the way geriatric patients are being treated in health care facilities. This is because as the elderly are getting closer to the end of their lives, many are starting to decline. Meaning that the elderly can become less verbal, making it harder for them to communicate and carry a conversation. Therefore, does this make it harder on the caregiver to provide the proper care? For an example, as the nurse taking care of an elderly…