A random sample of testimonials for texting and driving videos and number of car crashes was measured, and the computer output for regression was obtained: Coefficients Standard Error t Stat P-value
Intercept 9.983566646 1.400031473 7.130959 0.002045
Testimonials −0.119902617 0.038348632 −3.12665 0.035299

R-sq. = 70.96% R-sq.(adj) = 63.70%

Part A: Use the computer output to determine the LSRL. Identify all the variables used in the equation. (3 points)
Part B: What proportion of the variation in car crashes is explained by its linear relationship to video testimonials? Explain. (4 points)
Part C: Determine if decreased accidents were caused by texting and driving videos. Explain your reasoning. (3 points)

central angle of a triangle has the same measure as its intercepted arc.

step-by-step explanation:

step-by-step explanation:

part a. the differences are decreasing, so we know the sequence is not arithmetic. the ratios are constant (=3/4), so we know the sequence is geometric.

part b. from part a, we know the common ratio is 3/4, so each term is 3/4 of the one before. the initial term is the number of gallons at h=1.

g[h] = (3/4)·g[h-1]

g[1] = 384 . . . . initial value required for a recursive definition

part c. the general formula for a geometric sequence is

a[n] = a[1]·r^(n-1)

we have a[1] = 384, r = 3/4, and the term number given by h. the formula that follows is

g[h] = 384·(3/4)^(h-1)

part d. filling in the value and doing the arithmetic, we have

g[12] = 384·(3/4)^11 ≈ 384·0.042235136 ≈ 16.2183 . . gallons

part e. each gallon is 4 quarts, so

16.2183 gal × 4 qt/gal = 64.8732 qt

for future students the answer is b

hope i

-lavira: )