Module 2 Probability and Statistics
... The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes with a standard deviation of 0.5 minutes. We want to test to determine whether or not the mean waiting time of all customers is signi ...
... The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes with a standard deviation of 0.5 minutes. We want to test to determine whether or not the mean waiting time of all customers is signi ...
Confidence Intervals for Information Retrieval Evaluation
... we simply generate the system score using a suitable evaluation metric E and compare the paired evaluation scores using a significance test. If a reader obtains two publications that have developed new systems Sx and Sy respectively, the reader is unable to determine from the published results in bo ...
... we simply generate the system score using a suitable evaluation metric E and compare the paired evaluation scores using a significance test. If a reader obtains two publications that have developed new systems Sx and Sy respectively, the reader is unable to determine from the published results in bo ...
Psychology 2010 Lecture 10 Notes: Hypothesis Testing Ch 6
... hours and may be counting on the fact that no one really pays attention. But the difference between 2000 hours and 5000 hours will add up over multiple purchases. In times when money is tight, those small differences may combine to make a large overall difference. Two possibilities H0. The populatio ...
... hours and may be counting on the fact that no one really pays attention. But the difference between 2000 hours and 5000 hours will add up over multiple purchases. In times when money is tight, those small differences may combine to make a large overall difference. Two possibilities H0. The populatio ...
Chapter 3 Regression and Correlation Simple Least squares
... with mean µY = α + X, which changes for each value of X, and the same standard deviation, , which is the same at every value of the independent variable, X. The relation between X and Y may also be formulated as Y X . 3. As a result of the above assumptions, the error terms, , are iid ...
... with mean µY = α + X, which changes for each value of X, and the same standard deviation, , which is the same at every value of the independent variable, X. The relation between X and Y may also be formulated as Y X . 3. As a result of the above assumptions, the error terms, , are iid ...
Data Display
... Example 12.6 works with two groups of data; the second group (Stat 13) has 148 students. The sample is large so the t-confidence interval would work even if the distribution of the hours of sleep were not normal. The first sample (n=25) is not large and it is necessary to check its distribution befo ...
... Example 12.6 works with two groups of data; the second group (Stat 13) has 148 students. The sample is large so the t-confidence interval would work even if the distribution of the hours of sleep were not normal. The first sample (n=25) is not large and it is necessary to check its distribution befo ...