Aresearcher would like to test the claim that 9 out of 10 doctors prefer brand x. a sample of 60 doctors is obtained and each is asked to compare brand x with another leading brand. the data show that 48 of the doctors picked brand x. if these data are evaluated using a chi-square test for goodness of fit, what is the expected frequency for brand x? quizlet

there are many solutions.

step-by-step explanation:

step 1: simplify both sides of the equation.

4x+6=4x^2+10x−4

step 2: subtract 4x^2+10x-4 from both sides.

4x+6−(4x^2+10x−4)=4x^2+10x−4−(4x^2+10x−4)

−4x^2−6x+10=0

step 3: factor left side of equation.

−2(2x+5)(x−1)=0

step 4: set factors equal to 0.

x=-5/2 or x=1

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step-by-step explanation:

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