Write the null and alternative hypothesis for the following situation. Then describe what making a type I error would mean for this situation.

According to Giving and Volunteering in the United States, 2001 Edition, the mean charitable contribution per household in the United States in 2000 was $1,623. A researcher believes that the level of giving has changed since then.

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm

Dbc if u do the math and stuff that what i got let me know if i was wrong