In: Statistics and Probability
When a poultry farmer uses his regular feed, the newborn checkens have normally distributed weights with a mean of 61.961.9 oz. In an experiment with an enriched feed mixture, ten chickens are born with the following weights (in ounces).
67, 65.9, 65.6, 64.5, 64, 62.7, 69.1, 66.6, 64, 63.867, 65.9, 65.6, 64.5, 64, 62.7, 69.1, 66.6, 64, 63.8
Use the α=0.05α=0.05 significance level to test the claim that
the mean weight is higher with the enriched feed.
The sample mean is x¯¯¯=x¯=
The sample standard deviation is s=
The test statistic is z/t
The critical value is z/t
the conclusion is
A. There is not sufficient evidence to support the
claim that with the enriched feed, the mean weight is greater than
61.9.
B. There is sufficient evidence to support the
claim that with the enriched feed, the mean weight is greater than
61.9.