A researcher thinks a population of fish has a mean weight of 3.4 kilograms and a standard deviation of .8 kilograms. She takes a simple random sampleof 30 fish and finds that the mean is 3 kilograms.
True or False: Using a significance level of .05, there's significant evidence
that the population mean is actually lower than 3.4 kilograms.
A. True.
B. False.