Researchers take a random sample of 100 patients who have experienced a myocardial infarction (MI, heart attack). They wish to estimate the average age at which an event occurs. A 95% confidence interval of the average age at the time of the event based on the sample of 100 was 59.8 to 68.5. What is the interpretation of this interval?

a. This interval gives a plausible range of values for the average age of MI in this sample of 100 patients.

b. Most (95%) of the patients in the sample had a heart attack between 59.8 and 68.5 years of age.

c. This interval gives a plausible range of values for the true average age of MI in the population of all patients from which the sample was taken.

d. 95% of all heart attacks occurs between the ages of 59.8 to 68.5 in the population from which the sample was takem