In a random sample of 520 adults, the mean was 150 and the standard deviation was 4.5. The study was reported with a 95% confidence level, and the confidence interval for the study was 150 ± 0.39. What range of values shows the confidence interval for the study?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Neoli is a nurse who works each day from 8: 00 am to 4: 00 pm at the blood collection centre. she takes 45 minutes for her lunch break. on average, it takes neoli 15 minutes to collect each sample and record the patient's details. on average, how many patients can neoli see each day?