Based on a random sample of 25 units of product X, the average weight is 102 lb and the sample standard deviation is 10 lb. We would like to decide whether there is enough evidence to establish that the average weight for the population of product X is greater than 100 lb. Assume the population is normally distributed. Therefore, one way of expressing the null hypothesis is H₀: μ = 100.

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Quizplus · Accepted Answer

The equals sign always belongs in the null hypothesis-if the average weight is equal to 100, then it is not more than 100 (which is what we are trying to prove).

Based on a Random Sample of 25 Units of Product