STF1103 STATISTICS FOR BIOLOGY II
In class exercise – Sign Test
Deadline for submission: 30
March 2021, 8am through eLEAP
Submission as group (3-4) members
Sign test (1 sample and paired sample sign test)
When should you use the Sign test instead of the
Why is the Sign test being the simplest nonparametric test to use?
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%.
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?