Treatment of wastewater is important to reduce the concentration of undesirable pollutants. One such substance is benzene, which is used as an industrial solvent. Two methods of water treatment are being compared. Treatment 1 is applied to seven specimens of wastewater, and treatment 2 is applied to ten specimens. The benzene concentrations, in units of milligrams per liter, for each specimen are as follows: Treatment 1 Treatment 2
X1-bar: 6.8 mg/L X2-bar: 5.7 mg/L
s1:0.9 mg/L s2: 1.6 mg/L
n1:5 n2:7

Required:
State the p-value to 4 decimal places or the critical value to 3 decimal places.

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

step-by-step explanation: it is d

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33