The mean number of words per minute (WPM) read by sixth graders is 89 with a standard deviation of 16 . If 66 sixth graders are randomly selected, what is the probability that the sample mean would differ from the population mean by more than 5.09 WPM? Round your answer to four decimal places.

muyb ajo

step-by-step explanation:

jegosu

can you complete your sentence? i could !

look at the picture.

1.

ef : ab = 2 : 3

gf : cb = 2 : 3

gh : cd = 2 : 3

he : da = 2 : 3

2.

∠a ≅ ∠e

∠b ≅ ∠f

∠c ≅ ∠g

∠d ≅ ∠h

3.

use pythagorean theorem:

the length of the abcd trapezoid sides:

|ab| = 3 cm

|bc| = 10 cm

|cd| = 3(3) cm = 9 cm

|da| = 8 cm

the perimeter of abcd = 3 + 10 + 9 + 8 = 30 cm

the ratio of perimeters of the tarapezoids is equal 2 : 3.

substitute:

      cross multiply

      divide both sides by 3