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8. Physiologists often use the forced vital capacity as a way to assess a person's ability to move air in and out of their lungs. A researcher wishes to estimate the forced vital capacity of people suffering from asthma. A random sample of 15 asthmatics yields the following data on forced vital capacity, in liters.. 5.2 3.4 29 5.3 3.0 4.0 5.2 5.2 3.2 4.7 3.2 3.5 4.8 4.0 5.1 It should be noted that the sample mean and sample standard deviation of these data are given by i = 4.18 and s = 0.924, respectively. Use the data to obtain and interpret a 95% condence interval for the mean forced vital capacity for people suffering from asthma. Assume that the population from which the sample is selected is normally distributed. [I-Iint: Use the t-interval for the mean #5]