The Owner of a Fish Market Has an Assistant Who

question 143

Multiple Choice

The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed,with a mean of 3.2 pounds and standard deviation of 0.84 pounds.If a sample of 16 fish is taken,what is the standard error of the mean weight?

• A)0.840
• B)0.053
• C)0.210
• D)None of these choices.

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Definitions:

Placebo Effect

The phenomenon in which a person's condition appears to improve after taking a placebo, a treatment that has no therapeutic effect, due to the individual's belief in the treatment's efficacy.

Experimenter Effect

A phenomenon where the biases or expectations of the experimenter inadvertently influence the outcome of an experiment.

Random Assignment

A method used in experiments to evenly distribute participants across various groups, ensuring that each has an equal chance of being assigned to any group.

Selection Bias

The assignment of participants to experimental or control groups in such a way that systematic differences among the groups are present at the beginning of the experiment.