Solution :
95% confidence interval for the difference between the means of ACT scores between two schools, is given by :
![$[(\overline X_1 - \overline X_2)-ME, (\overline X_1 - \overline X_2)+ME]$](https://tex.z-dn.net/?f=%24%5B%28%5Coverline%20X_1%20-%20%5Coverline%20X_2%29-ME%2C%20%28%5Coverline%20X_1%20-%20%5Coverline%20X_2%29%2BME%5D%24)



M.E. , Margin of error,



= 9.222
s = 3.03


= 1.4
Therefore, 95% CI = [(25.90-27.70) - 1.4 , (25.90-27.70) + 1.4]
= [-3.2, -0.4]
Therefore, the lower bound is -3.2
9514 1404 393
Answer:
342 mm²
Step-by-step explanation:
The triangle shown has a base of 9 mm and a height of 76 mm. Its area is ...
A = 1/2bh
A = (1/2)(9 mm)(76 mm) = 342 mm²
The triangle shown has an area of 342 mm².
_____
<em>Additional comment</em>
The other leg of the right triangle with one leg 76 mm and hypotenuse 100 mm will be about 65 mm. The base shown is 9 mm, so any triangle with the dimensions shown will be a fairly skinny obtuse triangle, not the acute triangle in the picture. (This makes us suspect an error: the 9 mm dimension maybe should be 90 mm.)
Answer:
C. 35
Step-by-step explanation:
Use the equation: y= 10+5x
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Both side multiply by one number.