very easy stats problem i need help!!! ASAP! Data: patient STUDY: A study was co
ID: 3330477 • Letter: V
Question
very easy stats problem i need help!!! ASAP!
Data:
patient
STUDY: A study was conducted at a major north eastern American medical center regarding blood cholesterol levels and heart-attack incidents. A total of 28 heart-attack patients had their cholesterol levels measured two days, 4 days, and 14 days after the attack. In addition, cholesterol levels were recorded for a control group of 30 people who had not had a heart attack. The units of cholesterol measurement are not given in the original reference but are presumably mg/dL of blood.
QUESTION: For this question only consider the heart attack patients, i.e. group 1, and only consider the cholesterol measurements taken 2 days after a heart attack.
(a)What is the size of the sample?
(b) What target population does the sample represent?
(c)Calculate a 95% confidence interval for the mean cholesterol level in the population of heart attack patients two days after an attack. Be sure to record the values of the estimate and the margin of error.
(d) Calculate a 99% confidence interval for the mean cholesterol level in the population. Be sure to record the values of the estimate and the margin of error. How does the 99% CI compare with the 95% CI from 2c?
patient
group day cholest 1 1 2 270 2 1 2 236 3 1 2 210 4 1 2 142 5 1 2 280 6 1 2 272 7 1 2 160 8 1 2 220 9 1 2 226 10 1 2 242 11 1 2 186 12 1 2 266 13 1 2 206 14 1 2 318 15 1 2 294 16 1 2 282 17 1 2 234 18 1 2 224 19 1 2 276 20 1 2 282 21 1 2 360 22 1 2 310 23 1 2 280 24 1 2 278 25 1 2 288 26 1 2 288 27 1 2 244 28 1 2 236 1 1 4 218 2 1 4 234 3 1 4 214 4 1 4 116 5 1 4 200 6 1 4 276 7 1 4 146 8 1 4 182 9 1 4 238 10 1 4 288 11 1 4 190 12 1 4 236 13 1 4 244 14 1 4 258 15 1 4 240 16 1 4 294 17 1 4 220 18 1 4 200 19 1 4 220 20 1 4 186 21 1 4 352 22 1 4 202 23 1 4 218 24 1 4 248 25 1 4 278 26 1 4 248 27 1 4 270 28 1 4 242 1 1 14 156 2 1 14 NA 3 1 14 242 4 1 14 NA 5 1 14 NA 6 1 14 256 7 1 14 142 8 1 14 216 9 1 14 248 10 1 14 NA 11 1 14 168 12 1 14 236 13 1 14 NA 14 1 14 200 15 1 14 264 16 1 14 NA 17 1 14 264 18 1 14 NA 19 1 14 188 20 1 14 182 21 1 14 294 22 1 14 214 23 1 14 NA 24 1 14 198 25 1 14 NA 26 1 14 256 27 1 14 280 28 1 14 204 29 2 NA 196 30 2 NA 232 31 2 NA 200 32 2 NA 242 33 2 NA 206 34 2 NA 178 35 2 NA 184 36 2 NA 198 37 2 NA 160 38 2 NA 182 39 2 NA 182 40 2 NA 198 41 2 NA 182 42 2 NA 238 43 2 NA 198 44 2 NA 188 45 2 NA 166 46 2 NA 204 47 2 NA 182 48 2 NA 178 49 2 NA 212 50 2 NA 164 51 2 NA 230 52 2 NA 186 53 2 NA 162 54 2 NA 182 55 2 NA 218 56 2 NA 170 57 2 NA 200 58 2 NA 176 Variable Description Patient Patient number Day Cholest Cholesterol level Number of days since heart attackExplanation / Answer
a) sample size is 28
b) Target Population : Heart attack patients
c) Mean=253.929 Standard Error=9.01644
The 95 % Confidence interval for mean is (Mean- 1.96*SE ,Mean-+1.96*SE)
=(236.2568, 271.6012)
d) The 99 % Confidence interval for mean is (Mean- 2.57*SE ,Mean-+2.57*SE)
(230.7567 ,277.1013)
,
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.