
Coping with Your Biostatistician
... • Small studies are problematic in two ways: – It’s difficult to get statistically significant results from a small study, and without significance, you can’t demonstrate that observed effects are “real” – If you don’t achieve significance, you also can’t necessarily say that there are no real effec ...
... • Small studies are problematic in two ways: – It’s difficult to get statistically significant results from a small study, and without significance, you can’t demonstrate that observed effects are “real” – If you don’t achieve significance, you also can’t necessarily say that there are no real effec ...
Test Code : QR ( Short answer type ) 2005
... 9. Life distributions of two independent components of a machine are known to be exponential with means and respectively. The machine fails if at least one of the components fails. Compute the chance that the machine will fail due to the second component. Out of n independent prototypes of the m ...
... 9. Life distributions of two independent components of a machine are known to be exponential with means and respectively. The machine fails if at least one of the components fails. Compute the chance that the machine will fail due to the second component. Out of n independent prototypes of the m ...
Analysis of data from the Morphology and
... This whole case looks haywire, so I shall delete it from the rest of the analysis, then multiply the heights below 200 by 10 to convert them to mm. ...
... This whole case looks haywire, so I shall delete it from the rest of the analysis, then multiply the heights below 200 by 10 to convert them to mm. ...
hypothesis testing
... expect from a test? The actual value of the power is usually difficult (and sometimes impossible) to obtain, since it requires us to know the H1 distribution. However, we can make the following general comments: 1. The power of a statistical test increases as the level of significance a increases. ...
... expect from a test? The actual value of the power is usually difficult (and sometimes impossible) to obtain, since it requires us to know the H1 distribution. However, we can make the following general comments: 1. The power of a statistical test increases as the level of significance a increases. ...
STAT 509 – Section 4.1 – Estimation Parameter: A numerical
... Another nice property of an estimator: we want it to be as precise as possible. The standard deviation of a statistic’s sampling distribution is called the standard error of the statistic. The standard error of the sample mean Y is / n . Note: As the sample size gets larger, the spread of the sam ...
... Another nice property of an estimator: we want it to be as precise as possible. The standard deviation of a statistic’s sampling distribution is called the standard error of the statistic. The standard error of the sample mean Y is / n . Note: As the sample size gets larger, the spread of the sam ...