A recent study focused on the number of times men and women send a Twitter message in a day. The information is summarized below. 
At the .01 significance level, is there a difference in the mean number of times men and women in a day? What is the test statistic for this hypothesis?
Definitions:
Expropriation
The act of a government taking privately owned property, often without fair compensation, for the public good.
Foreign Exchange Transactions
Trades between different currencies, involving the exchange of currency from one country for that of another at an agreed rate.
Tax Policy
The set of laws and regulations that govern how taxes are collected, the rates, exemptions, and incentives, impacting individuals and businesses.
Composite Risk Rating
A comprehensive evaluation of the risk level of a portfolio by considering various risk factors and metrics to assign an overall rating.
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