Internet Exercises Speech or Presentation Example | Topics and Well Written Essays - 1500 words

internet Exercises - Speech or Presentation ExampleBy extreme we mean far from what we would expect to respect if the null hypothesis is true.In other words, a small P-value indicates that observation of the foot race statistic would be marvelous if the null hypothesis is true. The lower the P-value, the more evidence there is in favor of rejecting the null hypothesis.The z- bear witness for a mean is a statistical test for a existence mean. The z-test give the gate be used when the population is normal and is known, or for any population when the sample size n is at least 30. The test statistic is the sample mean and the standardized test statistic is z.A chi-square test can be used to test if the variance (square of standard deviation) of a population is equal to a specified value. This test can be either a two-sided test or a one-sided test. The two-sided version tests against the election that the true variance is either less than or greater than the specified value. The o ne-sided version totally tests in one direction. The choice of a two-sided or one-sided test is determined by the problem. For example, if we are testing a new process, we may only be concerned if its variability is greater than the variability of the current process.Sample Problem A hospital administrator believes that the standard deviation of the image of people using outpatient surgery per day is greater than 8. A random sample 15 old age is selected. The data are shown. At = 0.10, is there enough evidence to support the administrators read? Assume the variable is normally distributed.Sample Problem A researcher wanted to see if women varied more than men in weight. Nine women and sixteen men were weighed. The variance for the women was 525 and the variance for the men was 142. What can be concluded at the 0.05 level of significance?Since we are testing to see if the variance for the women