A researcher is investigating the amount of time adults spend on social media. The following is a dataset of the average number of hours adults spend on social media per week: 16.5, 34.8, 29.9, 21.4, 29.6, 27.6, 24.4, 24.7, 14.5, 22.3, 30.6, 29.2, 17.2, 16.9, 15.1, 13, 34.9, 21.2, 21.1, 11 The researcher realised an error had occurred where each value of the dataset should be multiplied by 1.5. The researcher corrects the data. Calculate the sample standard deviation of the amended dataset and give your answer in 2 d.p.