Statistical Methods Assignment Research Paper Example | Topics and Well Written Essays - 1000 words

Statistical Methods Assignment - Research Paper ExampleSince this is a weight reduction study, we did a one-directional t test. Results showed that the diet resulted in a significant decrease in weight, both for a 90% and 95% assumption level.In both cases, it is sane to say that two-thirds of the general universe of discourse agrees with the principle of University top-up fees. The hypothesized p is included in both intervals. We, therefore, do non reject the null hypothesis.... 0.05p = 2*0.0096 = 1 - 0.9808 = 0.0192The test shows that there is a significant statistical difference among the sample mean and the hypothesized mean, on a 95% confidence level. We, therefore, reject the null hypothesis. read/write head 6sample size121 layer of freedom120sample mean47.50critical t1.658sample standard deviation7.5090% confidence interval(46.37, 48.63)Assuming that the population standard deviation is equal to the sample standard deviation, the confidence interval becomes(46.38, 48.62) The two intervals do not seem to have a significant difference mingled with them. This is a result of having a large sample size. As the sample size increases, the difference between the two intervals is also expected to significantly increase, resulting to large errors.Question 7t ratio3.364 important ()critical t0.052.306reject H00.101.860reject H0In this test, we assume that the sample standard deviation approximates that of the population without any significant statistical difference. Since this is a weight reduction study, we did a one-directional t test. Results showed that the diet resulted in a significant decrease in weight, both for a 90% and 95% confidence level.Question 8T680N1050T/n0.648p0.667standard deviation0.228Test Statistic1.29 (1.29)0.9015p value0.197095% confidence interval(0.619, 0.677)90% confidence interval(0.623, 0.672)In both cases, it is reasonable to say that two-thirds of the general population agrees with the principle of University top-up fees. The h ypothesized p is included in both intervals. We, therefore, do not reject the null hypothesis.Question 9To estimate a population proportion p with a 95% confidence