Achemist made six independent measurements of the sublimation point of carbon dioxide (the temperature at which it changes to dry ice). she obtained a sample mean of 196.64 k with a standard deviation of 0.68 k. a. use the student's t distribution to find a 95% confidence interval for the sublimation point of carbon dioxide. b. use the student's t distribution to find a 98% confidence interval for the sublimation point of carbon dioxide. c. if the six measurements had been 196.35, 196.32, 196.4 198.02, 196.36, 196.39, would the confidence intervals above be valid