2. Savannah took out a 7/1 variable-rate mortgage for $114,000. The interest rate for the first period was fixed at 6.15%, and the loan was amortized over 30 years. At the end of the
initial loan period, the interest rate was 7.15%, plus a 1.25% margin. Use this information to
figure out how much Savannah's monthly payment increased in the eighth year of her
mortgage. (10 points: Part 1 - 2 points; Part II - 2 points; Part III - 2 points; Part IV - 2 points;
Part 1 - 2 points)
I
Part I: What was Savannah's monthly payment for the first 7 years of the loan?

Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. here are data on the "penetrability" of the same type of soil at two levels of compression. penetrability is a measure of how much resistance plant roots will meet when they try to grow through the soil. compressed soil 2.85 2.66 3 2.82 2.76 2.81 2.78 3.08 2.94 2.86 3.08 2.82 2.78 2.98 3.00 2.78 2.96 2.90 3.18 3.16 intermediate soil 3.17 3.37 3.1 3.40 3.38 3.14 3.18 3.26 2.96 3.02 3.54 3.36 3.18 3.12 3.86 2.92 3.46 3.44 3.62 4.26 use the data, omitting the high outlier, to give a 95% confidence interval for the decrease in penetrability of compressed soil relative to intermediate soil. compute degrees of freedom using the conservative method. interval: to