1. To estimate the mean triglyceride levels of people in West Palm Beach, a blood test...
1. To estimate the mean triglyceride levels of people in West Palm Beach, a blood test on 20 randomly selected people was conducted and yielded a mean triglyceride level of 200, with a standard deviation of 10. Construct a 95% confidence interval for the true average triglyceride level of people in West Palm Beach. Round your answer to three decimal places. (3 points)
- a. (218.868, 229.132)
- b. (214.967, 233.033)
- c. (219.741, 230.259)
- d. (195.320, 204.680)
Homework Answers
Answer:
d. (195.320, 204.680)
sample mean = 200
standard deviation = 10
confidence interval = 95%
t value = 2.093
margin of error = t(s/sqrt(n))
= 4.680
lower limit = sample mean - margin of error = 195.320
upper limit = sample mean + margin of error = 204.680
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