APLUSA Stats vs TPNZSurvey

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%.

TPNZSurvey – Conduct customer surveys and collect data anywhere at any time. No internet connection required! Suitable for small or large projects, use TPNZSurvey to gather accurate timely customer feedback to improve your overall business performance. Use TPNZ Survey for: - MARKET RESEARCH - face to face interviews. - SURVEY KIOSKS – Unattended customer feedback booths - LEAD CAPTURE - trade shows, conferences, training events - SHOPPER FEEDBACK – supermarkets, malls and retail stores. - HOSPITALITY - restaurant and accommodation feedback. - MUSEUMS and MANAGED FACILITIES – visitor feedback. - CUSTOMER SATISFACTION – interviews and surveys. - AUDITS – interactive audit questionnaires FEATURES: - OFFLINE – TPNZSurvey does not need an internet connection to gather data. Securely store the results on one or multiple devices and sync when you reconnect to the internet. - MULTIPLE DEVICES – Run surveys on multiple devices, then group and manage them. - QUESTION TYPES – TPNZ Survey supports Email validation, Single and Multi Select options, Images, Likert scales, Signatures, Photo Capture, QR Codes and Barcodes. - MULTI-LINGUAL – TPNZSurvey supports English, Spanish, French, Portuguese, German, Dutch, Simplified Chinese, Arabic, Italian, Danish, Finnish, Farsi, Pashtun. - ALL DEVICE TYPES – TPNZSurvey is optimized to work on iPads and iPad Minis but works great on iPhones as well. You can also run a survey on other popular devices. - UPLOAD OPTIONS – TPNZSurvey can automatically upload results when your device has an internet connection, or you can upload results manually. - SPSS and CSV – download your results in the SPSS or CSV format. - KIOSK MODE – use your iPad as a survey kiosk. TPNZSurvey supports automatic restarting of the survey if it is idle for a length of time. Save or remove the partial results when a survey is abandoned – up to you. - HOT ANSWERS – set up an email address to receive instant alerts when a particular answer is uploaded. - BRANDING –custom color themes. Display your own branding and background images.