Provide a rationale for your answer. The finding that the depression scores decreased from baseline to posttest in the experimental group is expected. Given a lower depression score is favorable for these patients, having these patients participate in the intervention is more likely to be a positive experience because of the possible impact the experiment can influence these patients’ well-being through this empowerment program. Because of the former, the desirable outcome of happier (not as depressed) patients is expected. 4.
Technical Notes Exploratory Analysis The histogram, box plot and dot plot all show the data is slightly right skewed: the median (1088.65) is slightly less than the mean (1102.59) and the skewness statisti is a fairly small positive value (0.58). Checking Assumptions The independence of the observations appears to be satisfied from the data description. The Shapiro-Wilk Normality test shws strong evidence gainst the hypothesis that the underlying distribution is normal (P-value=0.008103). The Normal Q-Q plot shows a slight curve through the points indicating slight right skewness. Although the data are slightly right skewed, because of the large sample size(n=152) our inference on the mean is valid, by the Central Limit Therom.
Provide a rationale for your answer. Discuss the meaning of this result in this study. Yes t = -1.99 is significant because the p= 0.049 value is smaller than alpha (a) that was set at 0.05 for this study. From the study, this means that there is a significant difference between the results obtained from men and women since this is one of the values that allows the selected hypothesis to be correct, the significance is support to the performed experiment. 4.
Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 6 2 out of 2 points | | | The Hurwicz criterion is a compromise between the maximax and maximin criteria. Answer | | | | | Selected Answer: | True | Correct Answer: | True | | | | | * Question 7 2 out of 2 points | | | Using the minimax regret criterion, we first construct a table of regrets. Subsequently, for each possible decision, we look across the states of nature and make a note of the maximum regret possible for that decision. We then pick the decision with the largest maximum regret. Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 8 2 out of 2 points | | | The chi-square test is a statistical test to see if an observed data fit a
Provide a rationale for your answer. Discuss the meaning of this result in this study. Yes t=-1.99 is significant because the p=0.049 value is smaller than alpha (a) that was set at 0.05 for this study. From the study, this means that there is a significant difference between the results obtained from men and women since this is one of the values that allows the selected hypothesis to be correct, the significance is support to the performed experiment. 4.
Understanding the Basis of Statistical Power in Psychology Research Work What is Statistical Power? The power of a statistical test for a null hypothesis is the probability of having the basis to correctly reject a false null hypothesis (Greene, 2000). Statistical power is the probability of detecting an effect if the effect actually exists or the probability that the test will lead to a conclusion that the effect actually exists (High, 2000 & Cohen, 1988, p. 4). It is also the ability of the test to report a statistically significant effect where an actual effect of a given magnitude exists. In simple terms, statistical power is the likelihood that a researcher will discover an effect of a certain size in a statistical test no matter how small.
The hypothesized result was that the furthest distance would be the most effective, and absorbance would decrease as the light became closer. The results supported the hypothesis and showed that the three distances all yielded a relatively similar and that all the absorbances were in fact lower than the control group. The results also showed that as the light was moved further away from the chloroplasts the DPIP was reduced faster, producing a lower absorbance. Effect of Light Wavelength In this experiment different colors of light were tested in order to see which caused the photosynthetic process to be the most efficient. Discs made of spinach leaves were deoxygenated and placed in beakers with different wavelengths of light in order to measure which wavelength produced the most oxygen the fastest.
The gamma group, however, performed worse than the baseline, so saying that all Binaural Beats tested improved short-term memory would be incorrect. This study’s conclusions are somewhat consistent with previous studies that tested Binaural Beats. This means that a logical conclusion can be made that some types of Binaural Beats improve the ability to remember words in
This particular test had a total of one-hundred and forty-six questions. The test was not hard to do, but towards the end I began to get a little antsy due to the fact that test taking process seemed to slow down and take more time. This was probably due the fact that I was beginning to get tired and sleepy. Taking the test at an earlier time would have probably been a better choice. The test was graded on a scale of 0 to 100.
A flicker paradigm occurs when an original and a modified image continually alternate, one after the other, with a brief blank field between the two. This study consisted of measuring reaction time based on presenting a flashing stimulus then either changing the stimulus with one of the independent variables; with a color-presence- location change or placement change, centrally versus marginally. The study also consisted of measuring whether reaction time was quicker or slower based on these changes occurring centrally or marginally. Based on the idea that visual acuity is good only in small area straight ahead, where the image is focused on a part of the retina called the fovea (St. James, Schneider, & Eschman, 2005), I predicted that reaction time would be quicker when the change was located centrally within the