# In class exercise 1 - Sign Test.docx - STF1103 STATISTICS...

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STF1103 STATISTICS FOR BIOLOGY II In class exercise – Sign Test 23 rd March 2021 Deadline for submission: 30 th March 2021, 8am through eLEAP Submission as group (3-4) members Sign test (1 sample and paired sample sign test) 1. When should you use the Sign test instead of the t test? 2. Why is the Sign test being the simplest nonparametric test to use? 3. A study on time duration for a banking transaction suggested that the median timing for each customer is 3.2 minutes. It is believed that the median timing in practices is longer than 3.2 minutes. A random sample of 16 customers were recorded as below: Test whether these data indicate that the median timing in practices is longer than 3.2 minutes, using α = 5%. 4. An IT researcher suggested that the median data usage for an undergraduate in the UNIMAS campus is 298 megabytes per day in year 2016. Recently, new readings were recorded from a random sampling of 18 undergraduates as shown in a table below. At α = 0.05, is there enough evidence to support the researcher’s claims?
5. In order to test a theory that alcohol consumption can have an effect on test scores, a