It is known that x1 and x2 are roots of the equation x2−8x+k=0, where 3x1+4x2=29. Find k.
1 answer:
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<h2>Answer with explanation:</h2>
As per given , we have
Sample size : n= 5
Degree pf freedom = : df= 5-1=4
Significance level for 90% confidence =
Using t-value table , t-critical value for 90% confidence:
Margin of error of :
Interpretation : The repair cost will be within $12.39 of the real population mean value 90% of the time.