We have two populations: Pop1 and Pop2. On Pop1 we have a random variable Y1 with mean value 32 and standard deviation 4, while on Pop2 we have a random variable Y2 with mean value 35 with standard deviation 3. Suppose we obtain independent random samples from each of the two populations, and each sample has 36 elements. Find the expected value of the random variable which assigns the sample average of Y2 for the Pop2 sample minus the sample average of Y1 for the Pop1 sample.

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed

i would say b) is your answer

sorry if im wrong

step-by-step explanation:

if she was to only spend a dollar she can get 1lb

step-by-step explanation:

region b will make the inequalities y < 2x + 1 and y > -x - 2 true ⇒ answer a

step-by-step explanation:

* lets study the graph and the inequality to solve the question

- the inequality y > -x - 2

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = -2 that means the line intersect the y-axis at point (0 , -2)

∵ the sign of the inequality is >

∴ we shad the part over the line

  region a and b

- the inequality y < 2x + 1

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = 1 that means the line intersect the y-axis at point (0 , 1)

∵ the sign of the inequality is <

∴ we shad the part under the line

  region b and c

∵ the common region between the two lines is region b

∴ region b will make the inequalities y < 2x + 1 and y > -x - 2 true