Answer :
Answer:
Following are the responses to the given question:
Step-by-step explanation:
n = 400
x = amount of displaying the reacts which would allow the fixing in the producing toothpaste = 334
Its value is more than [tex]\frac{4}{5}[/tex] dentists suggest the ingredient of the product.
[tex]\to p > \frac{4}{5}\\\\\to p > 0.8\\\\[/tex]
Level of significance =[tex]\alpha =0.01[/tex]