Use the Following to Answer the Question(s) Below

question 32

Multiple Choice

Use the following to answer the question(s) below.
A sample of 30-year fixed mortgage rates at 12 randomly chosen credit unions yields a mean rate of 6.65 % and a sample standard deviation of 0.39%. A sample of 30-year fixed mortgage rates at 16 randomly selected banks yields a mean rate of 7.05% and a sample standard deviation of 0.22%. Are the mean rates different between credit unions and banks? Relevant output is shown below.
-At the 0.05 level of significance, the correct conclusion is

• A) reject the alternative hypothesis.
• B) fail to reject the null hypothesis.
• C) evidence suggests that there is no significant difference in mean mortgage rates between credit unions and banks.
• D) reject the null hypothesis; evidence suggests that there is a significant difference in mean mortgage rates between credit unions and banks.
• E) fail to reject the null hypothesis; evidence suggests that the mortgage rates at credit unions are lower than at banks, on average.

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Definitions:

Heart Rate

The number of heartbeats per unit of time, typically expressed in beats per minute (bpm).

Cardiac Output

The volume of blood the heart pumps through the circulatory system in one minute, an important measure of cardiovascular health.

End-Diastolic Volume

The volume of blood in the ventricle at the end of the filling phase, or diastole, of the heart's cycle.

Venous Return

The flow of blood back to the heart through the veins, critical for maintaining cardiovascular function.