
Cluster Sampling
... Situations can be met where the population contains a number of elements that have an extremely large value for the study variable. This is often the case in business surveys. A suitable sampling technique in such a case, especially for the estimation of a total, is one in which the inclusion probab ...
... Situations can be met where the population contains a number of elements that have an extremely large value for the study variable. This is often the case in business surveys. A suitable sampling technique in such a case, especially for the estimation of a total, is one in which the inclusion probab ...
Distribution of Sample Mean Slides
... somewhat, but not extremely, unusually low. 71.0 is 1.59 standard deviations from 79.7. ...
... somewhat, but not extremely, unusually low. 71.0 is 1.59 standard deviations from 79.7. ...
A Little Stats Won't Hurt You
... to be within 8 or 10 mmHg of 120 mmHg. That is, we are answering two questions of interest about the data: • What is the central value of the data? This is typically the most important question about any data set, which might follow our intuition. We usually want to know the average (expected) weigh ...
... to be within 8 or 10 mmHg of 120 mmHg. That is, we are answering two questions of interest about the data: • What is the central value of the data? This is typically the most important question about any data set, which might follow our intuition. We usually want to know the average (expected) weigh ...
Example 1
... basis of remembering what happened in the past. Because a certain event occurred in the past under certain conditions it is quite likely to happen again under those same conditions. There are many games that people play which involve pure chance and winning at these games cannot be controlled by the ...
... basis of remembering what happened in the past. Because a certain event occurred in the past under certain conditions it is quite likely to happen again under those same conditions. There are many games that people play which involve pure chance and winning at these games cannot be controlled by the ...
Confidence Intervals
... 97.5 percentile of the Standard Normal distribution. Also, the middle 95% of the distribution falls between the 2.5 and 97.5 percentiles. The problem comes when we don’t know what the true proportion, , is, so we have to estimate it with the sample proportion, p. Our 95% interval would be: p 1.96 ...
... 97.5 percentile of the Standard Normal distribution. Also, the middle 95% of the distribution falls between the 2.5 and 97.5 percentiles. The problem comes when we don’t know what the true proportion, , is, so we have to estimate it with the sample proportion, p. Our 95% interval would be: p 1.96 ...