In the absence of an off-the-shelf sample size calculator, we can use a simulation approach to explore the effects of a range of sample sizes on the power to detect a desired treatment effect with sufficient confidence.
read moreSelect recently had the opportunity to work with Conwy County Borough Council on the analysis of their Recycle More Survey. The council wanted to better understand attitudes towards recycling in the county and to understand the potential impact of possible changes to bin collection frequency.
read moreIn our latest project for Unex we set up and analysed an online survey of professional dog groomers to find out about their experiences with using Pet Remedy in their salons.
read moreFollowing on from our previous investigation into the link between cash savings and problem debt, StepChange Debt Charity asked Select to conduct an analysis to understand which types of households are failing to save, and also to identify attitudinal factors that might influence their decision not to save.
read moreSelect worked on the previous School Sport Surveys in 2013 and 2015. We were again asked to provide weightings for the survey in 2018. Survey weightings ensure that the reported results are representative of the population of school pupils in Wales.
read moreUnex market the Pet Remedy product which is designed to provide relaxing and calming relief for pet stress. To support their product, Select helped to conduct a study to test the effectiveness of their treatment for dogs with behavioural issues.
read moreCurrently the effectiveness of anticancer therapies is primarily evaluated using the length of tumour. A study was performed to identify whether tumour volume measurements were a more accurate alternative in assessing therapy response with the overall aim of informing imaging protocols for use in clinical drug trials and clinical care.
read moreCompanies who operate call centres such as telesales, market research or utility companies all monitor the calls that their staff make to ensure that they are complying with the relevant protocols. Using statistical techniques, these companies can sample a subset of calls that will accurately monitor call quality whilst minimising cost.
read moreMany businesses use online marketing strategies to increase the number of visitors to their websites. To test the effectiveness of these strategies, A/B split testing can be used to identify whether they increase visitor conversion to sales. Careful design of the test allows a company to minimise any potential costs and disruptions as well as better understand the demographics of their customer base.
read moreThe Big Bang South West is an annual science fair aimed at inspiring young scientists. Students can exhibit science projects which are judged throughout the day. By using a formal design, projects can be allocated to judges that meet any organisational constraints as well as ensuring that each project is given a fair score.
read moreTo test the effectiveness of a new device designed to eliminate smoke in the surgical field, an experiment was designed that collected information on the clarity of view during the surgery. By analysing these data it was possible to detect a positive effect of the new device and compare the effectiveness relative to alternative methods.
read moreCustomer satisfaction surveys are a useful tool for identifying strengths and weaknesses in a business. However, these types of surveys can suffer from a self-selection bias reducing their reliability. Using customer information (such as nationality, age or gender), it is possible to model the probability of a customer responding to a survey and to correct the bias caused by self-selection allowing businesses to better understand customer needs.
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