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Chapter 8: Q.17 (page 478)

Construct a 90% confidence interval for the population mean weight of the heads of lettuce. State the confidence interval, sketch the graph and calculate the error bound.

Short Answer

Expert verified

The class intervalCI:(2.1264,2.2736).

Step by step solution

01

Given Information

A 90%confidence interval for the population mean weight of the heads of lettuce.

02

Explanation

Let's find the confidence interval by using the given formula:

Confidence Interval=X¯±Zα2×σn=2.2±Z0.102×0.220=2.2±1.6449×0.220=[2.1264,2.2735]

Therefore,CI:(2.1264,2.2736).

The graph:

Error bound: EBM=0.07.

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