Chapter 11.4, Problem 11P

(a)

To determine

To test: The verification of ${\displaystyle \sum x=492},{\displaystyle \sum y=86.7,{\displaystyle \sum x^2=65.546,{\displaystyle \sum y^2=2030.55}}},$

${\displaystyle \sum xy=11351.9,r\approx \mathrm{0.93853.}}$

(b)

To determine

To test: The claim that $\rho >0$ at 0.01 level of significance.

(c)

To determine

To test: The verification of $S_e\approx 4.5759,a\approx 1.1405,b\approx 0.1646$

(d)

To determine

To find: The predicted distancewhen a drift bottle has been floating for 90 days.

(e)

To determine

To find: The90 confidence interval for $y$ when $x=90$.

(f)

To determine

To test: The claim that $\beta >0$ at 0.01 level of significance.