Chapter 5 Slides
... (.90,.95,.99 are typical values) • Central Limit Theorem - Sampling distributions of sample mean is approximately normal in large samples ...
... (.90,.95,.99 are typical values) • Central Limit Theorem - Sampling distributions of sample mean is approximately normal in large samples ...
Standard Deviation
... • The mean is considered significantly different from x if the test statistic is in the top 2.5% or bottom 2.5% of its probability distribution, resulting in a p-value less than 0.05. • We would use a two-tailed test to see if two means are different from each other (ie from different populations), ...
... • The mean is considered significantly different from x if the test statistic is in the top 2.5% or bottom 2.5% of its probability distribution, resulting in a p-value less than 0.05. • We would use a two-tailed test to see if two means are different from each other (ie from different populations), ...
Unit 6 – confidence intervals
... The pharmaceutical company knows the results of the high blood pressure medicine will • React differently on another group of patients. • When they report the results, they want to use an interval. • They said we are 95% confidence the new blood pressure medicine will reduce patient’s blood pressure ...
... The pharmaceutical company knows the results of the high blood pressure medicine will • React differently on another group of patients. • When they report the results, they want to use an interval. • They said we are 95% confidence the new blood pressure medicine will reduce patient’s blood pressure ...
Third test
... Show all your work: we are not interested in the result, but in the method you use to find it. In particular, when providing a "statistic" (like the mean, the standard deviation, and so on) indicate the formula you are using. When grouping data, as in finding a percentile, indicate (very briefly) wh ...
... Show all your work: we are not interested in the result, but in the method you use to find it. In particular, when providing a "statistic" (like the mean, the standard deviation, and so on) indicate the formula you are using. When grouping data, as in finding a percentile, indicate (very briefly) wh ...
Two Independent Samples Comparing Two Groups Setting
... test statistic at least this far from zero? The answer is the area below −1.99 and above 1.99 under a t density curve with 12.8 degrees of freedom. With the t-table, we can only calculate this p-value within a range. If we round down to 12 df, the t statistic is bracketed between 1.912 and 2.076 in ...
... test statistic at least this far from zero? The answer is the area below −1.99 and above 1.99 under a t density curve with 12.8 degrees of freedom. With the t-table, we can only calculate this p-value within a range. If we round down to 12 df, the t statistic is bracketed between 1.912 and 2.076 in ...
USC3002_2007.Lect3&4 - Department of Mathematics
... hypothesis is that in vufoil #13, the alternative hypothesis asserts that heights are normally distributed with mean 3.386 cm standard deviation where and are the same as for the null hypothesis and 20 samples are used and the significance .05 Suggestion: if the alternative hypothe ...
... hypothesis is that in vufoil #13, the alternative hypothesis asserts that heights are normally distributed with mean 3.386 cm standard deviation where and are the same as for the null hypothesis and 20 samples are used and the significance .05 Suggestion: if the alternative hypothe ...
