Consider the following hypothesis test: : : A sample of provided a sample mean of . The population standard deviation is . Enter negative value as negative number. a. Compute the value of the test statistic (to 2 decimals). b. What is the -value (to 4 decimals)? Use the value of the test statistic rounded to 2 decimal places in your calculations.

The answer to this problem is  B.

beanburito

step-by-step explanation:

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb