To Help Consumers Assess the Risks They Are Taking, the Food

Multiple Choice

To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine found in all commercial brands of cigarettes. A new cigarette has
Recently been marketed. The FDA tests on this cigarette yielded mean nicotine content of 26.5
Milligrams and standard deviation of 2.6 milligrams for a sample of n = 9 cigarettes. Construct a
90% confidence interval for the mean nicotine content of this brand of cigarette.

A) $26.5 \pm 1.710$
B) $26.5 \pm 1.612$
C) $26.5 \pm 1.685$
D) $26.5 \pm 1.589$