TABLE 10-3
A real estate company is interested in testing whether the mean time that families in Gotham have been living in their current homes is less than families in Metropolis. Assume that the two population variances are equal. A random sample of 100 families from Gotham and a random sample of 150 families in Metropolis yield the following data on length of residence in current homes.
Gotham: 
G = 35 months, SG² = 900 Metropolis: 
M = 50 months, SM² = 1050
-Referring to Table 10-3, what is the test statistic for the difference between sample means?
Definitions:
Closed-end Investment
An investment fund that has a fixed number of shares outstanding, typically traded on a stock exchange, unlike open-end funds that can issue unlimited shares.
NAV
Net Asset Value, the per-share value of a mutual fund or exchange-traded fund, calculated by dividing the total value of all the securities in the portfolio by the number of shares outstanding.
Premium/Discount
Refers to the amount by which the market price of a bond exceeds (premium) or is less than (discount) its face value.
Front-end Load
A sales charge or commission paid by an investor at the initial purchase of mutual fund shares, usually used to compensate brokers or sales agents.
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