A random sample of 100 observations from a normally distributed population possesses a mean equal to 80.4 and a standard deviation equal to 8.5. Use this information to complete parts a through e below. a. Find a 95% confidence interval for 00 (Round to two decimal places as needed) b. What do you mean when you say that a confidence coefficient is 0.957 OA. A confidence coefficient of 0,95 means that there is a probability of 0.95 that an interval estimator constructed using this coefficient will enclose the population parameter OB. A confidence coefficient of 0.95 means that there is a probability of 0.95 that an interval estimator constructed using this coefficient will contain all of the values in the relevant sample OC. A confidence coefficient of 0.96 means that 95% of the values in the population will be bontained in an interval estimator constructed using this coofficient OD. A confidence coefficient of 0.95 means that 95% of the values in any sample taken from the population will be contained in an interval estimator constructed using this coefficient c. Find a 99% confidence interval for OD (Round to two decimal places as needed) d. What happens to the wath of a confidence interval as the value of the confidence coefficient is increased while the sample site is held food? A random sample of 100 observations from a normally distributed population possesses a mean equal to 80.4 and a standard deviation equal to 8.5. Use this information to complete parts a through e below a UDRY W c. Find a 99% confidence interval for je. (20 (Round to two decimal places as needed) d. What happens to the width of a confidence interval as the value of the confidence coefficient is increased while the sample size is held fixed? Increasing the confidence coefficient while keeping the sample size fixed