x = 1
Step-by-step explanation:
Given data:
Recall: If f(x) = 0, then x is called the zero of the function.
To find zero of the function, take f(x) = 0.
Add 6 to both sides of the equation.
Divide both sides of the equation by 3.
Taking square on both sides of the equation.
⇒ x + 3 = 4
⇒ x = 1
Hence, the zero of the function is 1.
Answer:
Mean weight gained of two goods is not significantly different under 0.05 or 0.01 significance level, but it is under 0.10 significance level.
Step-by-step explanation:
We need to calculate the z-statistic of the differences of sample means and compare if it is significant under a significance level.
Z-score can be calculated using the formula:
z= where
putting the numbers in the formula:
z= ≈ -1.51
and z-table gives that P(z<-1.51) = 0.0655
To conclude if the competitor good is significantly better, we need to choose a significance level and compare it to 0.0655.
For example, the difference in mean weight gained of two goods is not significant under 0.05 or 0.01 significance since 0.0655 is bigger than these values. But we can conclude that under 0.10 significance, competitor brand mean weight gain is significantly more than the Gibbs brand mean weight gain.