A watchmanufacturer creates watch springs whose properties must beconsistent. In

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A watchmanufacturer creates watch springs whose properties must beconsistent. In particular, the standard deviation in theirweights must be no greater than 3.0 grams. Fifteen watchsprings are selected from the production line and measured; theirweights are 9, 9, 2, 1, 1, 10, 4, 8, 10, 9, 3, 9, 9, 6, and 8grams. Assume â =0.01.
·        State the null and alternatehypotheses
·        Calculate the sample standarddeviation
·        Determine which test statistic isappropriate (chi-square or F), and calculate its value.
·        Determine the criticalvalue(s).
·        State your decision: Should the nullhypothesis be rejected? A watchmanufacturer creates watch springs whose properties must beconsistent. In particular, the standard deviation in theirweights must be no greater than 3.0 grams. Fifteen watchsprings are selected from the production line and measured; theirweights are 9, 9, 2, 1, 1, 10, 4, 8, 10, 9, 3, 9, 9, 6, and 8grams. Assume â =0.01.
·        State the null and alternatehypotheses
·        Calculate the sample standarddeviation
·        Determine which test statistic isappropriate (chi-square or F), and calculate its value.
·        Determine the criticalvalue(s).
·        State your decision: Should the nullhypothesis be rejected?

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