Using empirical data from an Internet/WAN distributed Web response time measurement system, this paper explores the relative applicability and usefulness of the geometric mean and geometric standard deviation, and introduces the lognormal distribution for quantifying the response time measurements. These st...
Brands and retailers who want to encourage product discovery among Gen Z consumers should take to digital channels like search and social media rather than trying to promote items in-store. This was originally featured in the Retail Daily newsletter. For more retail insights, statistics, and trends...
Changes in pricing often impact consumer behavior — and linear regression can help you analyze how. For instance, if the price of a particular product keeps changing, you can use regression analysis to see whether consumption drops as the price increases. What if consumption does not drop signif...
What does R’s name mean? The R language got its name for two reasons: because R is the first letter in the inventors’ names, and because R is a play on the name of its parent language S, which was originally developed by Bell Telephone Laboratories. R and S and Scheme To fully ...
You can run these tests using SPSS Statistics, the procedure for which can be found in our Testing for Normality guide. However, the t-test is described as a robust test with respect to the assumption of normality. This means that some deviation away from normality does not have a large ...
Not suitable for small or new businesses. As companies get bigger, so does the number of customers. They develop a stable customer base, so the churn is always lower than your total number of customers. In the case of small or new businesses, the customer base is not stable as the new...
What would be the value of df and critical value for the above data? Critical Value: The critical values of test statistics identify the rejection region in the distribution curve. For some distribution, we need degrees of freedom along with the significance level to find the critical ...
SPSS Mean Mode Median In order to find the SPSS mean mode median, you’ll need to use the Frequency table. It seems a little counter-intuitive, but the Descriptive Statistics tab does not give you the option to find the mode or the median. SPSS has a very similar interface to Microsoft...
What does a p-value mean when testing hypotheses with aggregated cross-cultural data in the field of evolution and human behavior? Several recent papers in the field of Evolution and Human Behavior rely on aggregate data when testing their hypothesis on adaptations in humans. This is p... TV...
Mean Squared Error: Overview, Examples, Concepts and MoreLesson - 13 All You Need to Know About the Empirical Rule in StatisticsLesson - 14 The Complete Guide to Skewness and KurtosisLesson - 15 A Holistic Look at Bernoulli DistributionLesson - 16 All You Need to Know About Bias in Statistic...