Anna's project for her introductory statistics course was to compare the selling prices of textbooks at two Internet bookstores. She first took a random sample of ten textbooks used that term in courses at her college, based on the list of texts compiled by the college bookstore. Then, she obtained prices of the 10 randomly selected textbooks at the two Internet sites to test if the average prices of textbooks sold at the two internet bookstores are different. The prices of those textbooks at the two Internet sites are shown below. Perform a significance test comparing the population mean prices. Site A $115 $79 $42 $138 $96 $25 $81 $97 $117 $69
Site B $110 $79 $39 $129 $96 $2 569 $97 $107 $66 5
Let mu_d be the population mean difference in price. State the hypotheses to test whether there is a difference in the mean price between the two Internet bookstores. Choose the correct answer below.
A. H_0: mu_d notequalto 0 and H_a: mu_d = 0
B. H_0: mu_d = 0 and H_3: mu_d > 0
C. H_0: mu_d = 0 = 0 and H_a: mu_d notequalto 0
D. H_0: mu_d = 0 and H_a: mu_d < 0
1. Determine the test statistic t = (Round to three decimal places as needed.)
2. Determine the P-value. P-value = (Round to three decimal places as needed.)

option 2 is correct.

step-by-step explanation:

we are given two inequality equation

x+y> 5 and -3x+2y< -2

first we draw the graph of both function using t-table method

equation: x+y> 5

for x=0, y=5

for x=-5, y=0

table:

x   :   0     5

y   :   5     0

test point (0,0) , 0> 5

false

equation: -3x+2y< -2

for x=0, y=-1

for x=2, y=4

table:

x   :   0     2

y   : -1       4

test point (0,0) , 0< -2

true

now we draw the graph. see the attachment for graph.

common region would be solution set.

option 2 is correct.

answer: b. f(x) = (x + 2)^3 (x^2 - 7x + 3)^4

step-by-step explanation:

polynomials always have as many roots as their order. this is a 4th order polynomial- hence 4 roots!

complex roots of polynomials always come in pairs. the quadratic equation has the "+/-" in that will alwaysgenerate m+ni amd m-ni, so 7-2i must be a root of this polynomial equation.

the order of the numerator and denominator are both 2. so the horizontal asymptote is y=a2/b2 =7

verticle asymptotes are the forbidden x-values. f(x) becomes undefined at x=-3 because this value will cause a zero denominator.

a graph of r(x) will have vertical asymptotes at ±1 because these values will make the denominator zero. so the domain of the function cannot include ±1.

you 're wlecome! : )

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