# Economists are constantly tracking interest rates. The following data represent the fixed mortgage..

- September 24, 2021 /
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Economists are constantly tracking interest rates. The

following data represent the fixed mortgage rates offered by a large New York

bank on the first of each month from January 1, 1986 to March 1, 1988:

Are interest rates declining over time? State Ho and Ha and

find the P-value.

Eight successive determinations of the salinity of a body of

water have been made:

2.33 2.24 2.29 2.20 2.18 2.25 2.19 2.15 Is the degree of

salinity decreasing over time? State Ho and Ha and calculate the P-value.