You gather a random sample of 30 people from a population and measure the observed heart rates. From this, you find that the sample mean is 50 beats per minute and the 95% confidence interval is 40 to 80 beats per minute. Which of the following is a correct statement?
Group of answer choices
a. We're 95% confident that the heart rate in the population is between 40 to 80 beats per minute
b. We're 95% confident that the sample heart rate is between 40 and 80 beats per minute
c. We're 95% confident that all of the people in the sample have a heart rate between 40 and 80 beats per minute
d. We're confident that 95% of people in the sample have a heart rate between 40 and 80 beats per minute