(10 points) Historically, these bolts have an average thickness of 10.1 mm. A recent random sample of 10 bolts yielded these thicknesses: (Data EX0406)9.7 9.9 10.3 10.1 10.59.4 9.9 10.19.710.3(a) Find the sample mean and standard deviation for these data.(b) Assume that the historical average is true. Calculate the observed valueof thet−statistic.(c) What is the probability of these statistics (or worse) if the true meanwere 10.1 mm

huh? im pretty sure it is in 199

step-by-step explanation:

my guess would be b and d, but i didn’t actually get out the pen and paper. lol

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