Q1: Twenty-one individuals with a heavy smoking history were subjected to the highest treadmill speed. The time in seconds until they became exhausted was recorded: 18, 16, 18, 24, 23, 22, 22, 23, 26, 29, 32, 34, 34, 36, 36, 43, 42, 49, 46, 46, 57. Calculate the mode, median, mean, upper and lower quartiles, range, and interquartile range. Q2: The following dataset represents the number of patients who visited a clinical unit through the last 11 months.: 22, 40, 53, 57, 93, 98, 103, 108, 116, 121, 252 Calculate the mean, sum of squared errors, variance, and standard deviation. Q3: Using the same dataset in Q2, calculate the same values (mean, sum of squared errors, variance, and standard deviation) again but excluding the outlier 252. Q4: Using the same dataset and the calculated mean in Q2, calculate a 95% confidence interval for this mean. (hint: consider using the two-tailed t-distribution table) Q5: Using the same dataset and the calculated mean in Q2, calculate a 99% confidence interval for this mean. (hint: consider using the two-tailed t-distribution table)