APLUSA Stats vs AplusA

3 common statistical tools used to analyze market research results: 1 - CONFIDENCE INTERVAL CALCULATOR 2 - COMPARING TWO PERCENTAGES 3 - SAMPLE SIZE CALCULATOR ----------------------------------------- 1 - CONFIDENCE INTERVAL CALCULATOR Level of accuracy in percentages observed: To conduct market research is to interview (or observe) a sample of individuals. The larger the sample, the greater the statistical accuracy. Confidence interval provides the level of accuracy of a given measure. FOR INSTANCE Upon interviewing a sample of 500 GP’s, 20% are found to be using Product A. So, what is, within the total population, the actual proportion of users of Product A. Assuming 5% risk level*, confidence interval is: • 20% +/-3.5 • [16.5%-23.5%] In other words, there is a 95% probability that the actual percentage of Product A users in the total population of GPs is between 16.5% and 23.5%. ------------------------------------- 2 - COMPARING TWO PERCENTAGES Statistical significance between 2 observed percentages: When comparing opinions (or attitudes) measured on two samples, a significance test is applied. Significance tests provide an indication whether observed percentages are significantly different or not. FOR INSTANCE Upon interviewing a sample of 500 GP’s, 20% are found to be using Product A. Equally, upon interviewing a sample of 150 cardiologists, 25% of those are found to be using Product A. Would such a result suggest that a larger proportion of cardiologists is using Product A? At 5% risk level*, the two percentages observed on these samples are not statistically different. In other words, there is a 95% probability that the actual proportion of Product A users among GPs’ total population is similar to the actual proportion of Product A users among cardiologists’ total population. ------------------------------- 3 - SAMPLE SIZE CALCULATOR Minimum sample size calculations: By taking into account an expected percentage, as well as the corresponding confidence interval, it is possible to calculate the sample size needed for a given market research survey. This application calculates the minimum sample of respondents needed in order to achieve the required level of research accuracy. FOR INSTANCE Research is needed to evaluate the level of use of Product A among anaesthetists. The desired confidence interval is +/-8. Approximately one third of anaesthetists is expected to be using Product A. How many anaesthetists need to be interviewed in order to achieve this margin of error? At 5% risk level*, for an expected percentage of 33%, with a confidence interval of +/-8, minimum sample size is 133 anesthetists. In other words, if you interview a minimum of 133 anesthetists, there is a 95% chance to get a confidence interval of +/-8 if the proportion of Product A users in the anesthetist sample is 33%.

The AplusA app helps you plan your visit to the fair, providing comprehensive information on the safety industry and its suppliers at the world No. 1 event in Düsseldorf. The perfect iPhone and iPad integration thanks to offline search, Maps connection and an interactive map of the exhibition centre allow you to prepare your visit to the fair perfectly. Interactive Site Map and Hall Layout iPhone’s optimised site and hall maps provide perfect guidance around the fair grounds. The site offers infinitely variable zoom and all information submitted by exhibitors. Zoom into the individual halls and see all stands. Just click on a stand and all exhibitor information plus the products offered will be displayed. Favourites Mark specific exhibitors and products as favourites and build your own personal list of things to remember, making the AplusA app into your digital companion as you make your way around the fair. News With the AplusA app you are always up to date. Find out about everything to do with the fair and its exhibitors as well as about the latest developments in the glass industry. Exclusive news on our business news channel keeps you up to date all the time – before, during and after the fair. Information on the trade fair All details revolving around your visit to the trade fair are presented in this area in a coherent format. Information on opening hours, admission prices, focal ranges on display, to name but a few assist you in optimally preparing your visit to the trade fair. Thanks to the comprehensive integration of calender and Maps your iPhone will become a perfect companion guide at the fair. Trade Fairs in Düsseldorf Hosting 50 trade fairs at its Düsseldorf Exhibition Centre, of which 24 are global premium trade fairs in their sectors, and about 120 of its own events the Messe Düsseldorf Group is among the leading export platforms worldwide. Gain an overview of all trade fairs held at the Düsseldorf Exhibition Centre including key data on the individual events. AplusA 2019 – International Trade Fair with Congress for Safety, Security and Health at Work. www.aplusa-online.com * the offline search covers selected contents of the database.