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1.   Catatonic makes and sells accessories for cats (kennels, collars, toys,…). Catanoic is starting production of...

1.   Catatonic makes and sells accessories for cats (kennels, collars, toys,…). Catanoic is starting production of a soft-sided pet carrier and wants to estimate the time to stitch the various pieces of fabric together. They produced a similar product before and it took 4.5 minutes to stitch. A sample of 10 of the new carriers took an average of 4.8 minutes with a standard deviation of 0.9 minutes. Is there sufficient evidence to conclude that the mean time has changed? Use a 5% significance level and the classical approach.1.H0:
HA:
2.What test statistic would you use?
3.When would you conclude that there is sufficient evidence to say that the mean time has changed?
4.Calculations and conclusion
5.Explain what is meant by a 5% significance level in this problem?
6.What assumptions are necessary for the above test statistic to be valid?

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