Construct Probability Histograms
-A Lab Orders a Shipment of 100 $\begin{array}{l|ccc}\text { Price } & \$ 10.00 & \$ 12.50 & \$ 15.00 \\\hline \text { Probability } & 0.2 & 0.15 & 0.65\end{array}$

question 88

Multiple Choice

Construct Probability Histograms
-A lab orders a shipment of 100 rats a week, 52 weeks a year, from a rat supplier for experiments that the lab conducts. Prices for each weekly shipment of rats follow the distribution below:
$\begin{array}{l|ccc}\text { Price } & \$ 10.00 & \$ 12.50 & \$ 15.00 \\\hline \text { Probability } & 0.2 & 0.15 & 0.65\end{array}$
Suppose the mean cost of the rats turned out to be $13.63 per week. Interpret this value.

• A) The average cost for all weekly rat purchases is $13.63.
• B) Most of the weeks resulted in rat costs of $13.63.
• C) The median cost for the distribution of rat costs is $13.63.
• D) The rat cost that occurs more often than any other is $13.63.

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Definitions:

Replication

The process of duplicating or reproducing scientific research to verify its findings.

National Rate

A statistical measure that represents a specific activity or occurrence across an entire country, often expressed per unit of population.

Dependent Variables

In an experiment, these are the variables that are tested and measured to see if they are affected by changes in the independent variables.

Random Samples

A selection method that gives each member of a population an equal chance of being chosen, often used in research to ensure representativeness.