Question:A medical researcher treats 400 subjects with high cholesterol
with a new drug. The average decrease...
Question
A medical researcher treats 400 subjects with high cholesterol
with a new drug. The average decrease...
A medical researcher treats 400 subjects with high cholesterol
with a new drug. The average decrease in cholesterol level is = 90
after two months of taking the drug. Assume that the decrease in
cholesterol after two months of taking the drug follows a Normal
distribution, with unknown mean μ and standard deviation σ =
30.
Which scenario would produce a confidence interval with a
smaller margin of error than a 95% confidence interval of 90 ±
2.94?