Answer to Question #347544 in Statistics and Probability for Binnn

Question

The National Steel Company is manufacturing steel wire with an average strength of 50 kilos. The laboratory tests a

random sample of 18 pieces of wires and finds that the mean strength is 48 kilos and the standard deviation is 10 kilos.

Are the results in accordance with the hypothesis that the company produces steel wire with an average strength of 50

kilos? Use 0.10 level of significance.

Ho

Ha

One-Tailed or Two-Tailed

Level of Significance

Critical Value

Draw Critical Region

Decision Rule

Test Statistic

Decision

Interpretation

Answer 1

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