. About 10% of people in the United States do not wear a seat belt. Suppose we take a random sample of 180 U. S. residents, and let X = the number of people who do not wear their seat belt. (a) Calculate the mean and standard deviation of the sampling distribution of X. (b) Interpret the standard deviation. (c) Justify that the distribution of X is approximately normal. (d) Use the normal distribution to calculate the probability that 26 or more individuals in the sample do not wear their seat belt.

h df tyjgtyj ttd y ytkgfty ty

step-by-step explanation:

tyty jry j y yj yttj yhgtyj y ghyj ytthj

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,

y = i/2 xtnop + (3i/2 tnop+ 1)

step-by-step explanation:

the picture is the step by step explanation.