Hypothesis testing: Test the hypothesis that average family produces 2.5 Kg of garbage

An environmental group claims that the average family produces 2.5 kilograms of organic garbage per day. Test this claim by constructing a 95% confidence interval for the mean weight of organic garbage produced by all families in the population. For your calculations, assume that a random sample of 16 families showed the mean weight of organic garbage to be 1.9 kilograms with a standard deviation of 0.10 kilograms. Do your calculations support or contradict the claim?

Hypothesis testing: Sample Size

A market research agency would like to estimate the proportion of Canadian households owning a personal computer. What minimum sample size will be required if they want to be 99% confident that the sample proportion will not differ from the true population proportion by more than 5%?

Hypothesis testing

A cold tablet is claimed to contain an average of 10 grains of aspirin. Test whether or not this claim is true if a random sample of 100 tablets shows a mean of 9.5 grains of aspirin and a standard deviation of 2.5 grains. Formulate and test the appropriate hypotheses at the 5% level of significance.

Test of Hypothesis for difference in proportions: A random sample of 200 workers from Factory A showed that 130 were satisfied with their job. Another random sample of 125 workers from Factory B showed that 70 were satisfied with their job. Can it be concluded that the proportion of satisfied workers in Factory A is greater than in Factory B?

A random sample of 200 workers from Factory A showed that 130 were satisfied with their job. Another random sample of 125 workers from Factory B showed that 70 were satisfied with their job. Can it be concluded that the proportion of satisfied workers in Factory A is greater than in Factory B? Formulate and test the appropriate hypotheses at the 1% level of significance

Hypothesis testing

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