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 world-shattering decrease in weight, both for a 90% and 95% confidence level.In both cases, it is reasonable to say that two-thirds of the general race agrees with the article of faith of University top-up fees. The hypothe coatd p is included in both intervals. We, therefore, do not reject the null hypothesis.... 0.05p = 2*0.0096 = 1 - 0.9808 = 0.0192The test shows that there is a significant statistical disagreement between the sample mean and the hypothesized mean, on a 95% confidence level. We, therefore, reject the null hypothesis.Question 6sample size121degree of freedom120sample mean47.50critical t1.658sample standard warp7.5090% 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 between 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 importantly increase, resulting to large errors.Question 7t ratio3.364alpha ()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 deviation0.228 screen 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 dogma of University top-up fees. The hypothesized p is inc luded in both intervals. We, therefore, do not reject the null hypothesis.Question 9To estimate a population proportion p with a 95% confidence