The computational formula for SS
... When you compute the statistic for every possible sample which can be taken from a distribution, and then create a frequency distribution, you have created a sampling distribution. So the means of all 9 samples form a sampling distribution of the mean. [This is a very important distribution, to whic ...
... When you compute the statistic for every possible sample which can be taken from a distribution, and then create a frequency distribution, you have created a sampling distribution. So the means of all 9 samples form a sampling distribution of the mean. [This is a very important distribution, to whic ...
Wiederholungssendung A
... A two-sided (symmetrical) test at a significance level of α=5% yields a pvalue of p=0.002. One can conclude that ...
... A two-sided (symmetrical) test at a significance level of α=5% yields a pvalue of p=0.002. One can conclude that ...
Statistics
... hypothesis test to determine whether the mean running time has changed as a result. The null (H0) and alternative (H1) hypotheses are a. H0: μ ≥ 9.6 hours; H1: μ = 9.6 hours b. H0: μ > 9.6 hours; H1: μ > 9.6 hours c. H0: μ ≠ 9.6 hours; H1: μ = 9.6 hours d. H0: μ = 9.6 hours; H1: μ > 9.6 hours e. Non ...
... hypothesis test to determine whether the mean running time has changed as a result. The null (H0) and alternative (H1) hypotheses are a. H0: μ ≥ 9.6 hours; H1: μ = 9.6 hours b. H0: μ > 9.6 hours; H1: μ > 9.6 hours c. H0: μ ≠ 9.6 hours; H1: μ = 9.6 hours d. H0: μ = 9.6 hours; H1: μ > 9.6 hours e. Non ...
Calculating the Risk of Type II Error (beta risk) When a test on the
... P (Z < 3.54) is about 1.00 — we see this because 3.54 is off the right-hand side of our table. This sort of thing (one of the Z-values off the table) will often, but not always, occur in the β calculation for a two-sided test. If we want to keep this α but reduce the β for a true mean of $118,000 (d ...
... P (Z < 3.54) is about 1.00 — we see this because 3.54 is off the right-hand side of our table. This sort of thing (one of the Z-values off the table) will often, but not always, occur in the β calculation for a two-sided test. If we want to keep this α but reduce the β for a true mean of $118,000 (d ...
Chapter 2 Problem Solutions
... Since data were derived from a market research survey, we view both the population mean and variance as having been estimated. Accordingly, the appropriate test statistic is based upon the t- ...
... Since data were derived from a market research survey, we view both the population mean and variance as having been estimated. Accordingly, the appropriate test statistic is based upon the t- ...
Sample
... Describing Sampling Distributions “How trustworthy is a statistic as an estimator of the parameter?” Center: Biased and unbiased estimators In the chips example, we collected many samples of size 20 and calculated the sample proportion of red chips. How well does the sample proportion estimate the ...
... Describing Sampling Distributions “How trustworthy is a statistic as an estimator of the parameter?” Center: Biased and unbiased estimators In the chips example, we collected many samples of size 20 and calculated the sample proportion of red chips. How well does the sample proportion estimate the ...
