Find the confidence interval for a population mean of 1.6 pounds at a 95% level of confidence with a sample size of 112 and standard deviation of 0.2 pounds.
A)1.89 to 1.90 pounds
B)4.52 to 42.52 pounds
C)1.56 to 1.64 pounds
D)1.72 to 2.08 pounds

Question

Quizplus · Accepted Answer

The confidence interval for a population mean can be calculated using the formula: mean ± (Z * (σ/√n)), where Z is the Z-score corresponding to the confidence level (for 95%, Z ≈ 1.96), σ is the standard deviation, and n is the sample size. Plugging in the given values: 1.6 ± (1.96 * (0.2/√112)) gives an interval of approximately 1.56 to 1.64 pounds.

Find the Confidence Interval for a Population Mean of 1