10.2 PPT
... • Random: The data come from two independent random samples or from two groups in a randomized experiment. o 10%: When sampling without replacement, check that n1 ≤ (1/10)N1 and n2 ≤ (1/10)N2. • Normal/Large Sample: Both population distributions (or the true distributions of responses to the two tre ...
... • Random: The data come from two independent random samples or from two groups in a randomized experiment. o 10%: When sampling without replacement, check that n1 ≤ (1/10)N1 and n2 ≤ (1/10)N2. • Normal/Large Sample: Both population distributions (or the true distributions of responses to the two tre ...
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... If the variances are unequal, the denominator in the t-statistic is harder to compute mathematically. But not with R. The only difference is that you don’t have to specify var.equal=TRUE (so it is actually easier with R). If we continue the same example we would get the following > t.test(x,y,alt="l ...
... If the variances are unequal, the denominator in the t-statistic is harder to compute mathematically. But not with R. The only difference is that you don’t have to specify var.equal=TRUE (so it is actually easier with R). If we continue the same example we would get the following > t.test(x,y,alt="l ...
Unit 6 – confidence intervals
... In order to determine the number of points a new high blood pressure medicine reduces a patient’s systolic measurement . A sample of 6 patients were given the medicine and their blood pressure was measured after the prescribe period of time. The number of points the blood pressure was reduce is list ...
... In order to determine the number of points a new high blood pressure medicine reduces a patient’s systolic measurement . A sample of 6 patients were given the medicine and their blood pressure was measured after the prescribe period of time. The number of points the blood pressure was reduce is list ...
Outlier detection
... • Weight trimming: weights of the outliers are changed to 1 • Number of outliers: avg. 2% of the cases • Change in the estimates: • Mean: -15% (in avarage) ...
... • Weight trimming: weights of the outliers are changed to 1 • Number of outliers: avg. 2% of the cases • Change in the estimates: • Mean: -15% (in avarage) ...
STATS 245.3 - Mathematics and Statistics
... The branch of statistics referred to as experimental design deals specifically with the collection of data. The branch of statistics referred to as descriptive statistics deals with summarizing the data after its been collected. The branch of statistics referred to as inferential statistics deals wi ...
... The branch of statistics referred to as experimental design deals specifically with the collection of data. The branch of statistics referred to as descriptive statistics deals with summarizing the data after its been collected. The branch of statistics referred to as inferential statistics deals wi ...
