Which would be used to solve this equation? Check all that apply. P/3 = 12

2 answers:

6 0

To solve the equation, you would "undo" the division by 3. The way you do that is to multiply both sides of the equation by 3.

Once you know the answer is 36, then you can check that by substituting 36 for p. (Some might call this "solution by guessing" if you were to start with this step.)

Applicable choices are
multiplying both sides of the equation by 3
substituting 36 for p to check the solution

Tems11 [23]2 years ago

5 0

Multiplying both sides of the equation by 3

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Answer:

a) $n=\frac{0.76(1-0.76)}{(\frac{0.01}{1.64})^2}=4905.83$

And rounded up we have that n=4906

b) For this case since we don't have prior info we need to use as estimatro for the proportion $\hat p =0.5$

$n=\frac{0.5(1-0.5)}{(\frac{0.01}{1.64})^2}=6724$

And rounded up we have that n=6724

Step-by-step explanation:

We need to remember that the confidence interval for the true proportion is given by :

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

Part a

The estimated proportion for this case is $\hat p =0.76$

Our interval is at 90% of confidence, and the significance level is given by $\alpha=1-0.90=0.1$ and $\alpha/2 =0.05$ . The critical values for this case are: