A medical research group is recruiting people to complete shortsurveys abo

A medical research group is recruiting people to complete shortsurveys about their medical history. For example, one survey asks for information on a person’sfamily history in regards to cancer. Another survey asks about what topics were discussed duringthe person’s last visit to a hospital. So far, as people sign up, they complete an average of just4 surveys, and the standard deviation of the number of surveys is about 2.2. The research groupwants to try a new interface that they think will encourage new enrollees to complete more surveys,where they will randomize each enrollee to either get the new interface or the current interface.How many new enrollees do they need for each interface to detect an eect size of 0.5 surveys perenrollee, if the desired power level is 80%?From the information, 0′ = 22,5“: 2 0.05, ,6 = 0.20, 0.5 The required sample size is esleulsted ss, 51 (Ear: + 3s): 51= 2-21 (30.05;: + 3020 )10.51 _ 2.21(1.96+0.8416)1 0.51=151.95 2- Thus,…

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