population mean (mu) = 20.2 , sample mean

Sample Size (N) = 25, population mean (mu) = 20.2, sample mean (Xbar) = 22.6, standard deviation = 6.2, t statistic = 1.935
I am looking to know how to answer the following question:
– Q3: What is the predictive adequacy of the null model relative to the alternative model? Round your answer to two decimal places. This is using the Bayes Factors, BF₀₁

The t-test has already been performed.