In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

A confidence interval has two bounds, the lower and the upper

Lower bound:

$\pi - M$

Upper bound:

$\pi + M$

In this problem, we have that:

$\pi = 0.26, M = 0.05$

Lower bound:

$\pi - M = 0.26 - 0.05 = 0.21$

Upper bound:

$\pi + M = 0.26 + 0.05 = 0.31$

The 95% confidence interval for the percent of all coffee drinkers who would say they are addicted to coffee is between 21% and 31%.

4 0

3 years ago

Give the name (monomial,<br> binomial, trinomial etc.) and<br> degree of the polynomial.<br> x + 2

Zielflug [23.3K]

Answer:

Step-by-step explanation:

x+2

degree is 1

$x^{1} +2$

and has two terms so is a binomial

7 0

2 years ago

What is the rule

Taya2010 [7]

Add 5

y is found by adding 5 to x

5 0

2 years ago

Determine the domain of the following graph:

Rama09 [41]

Answer:

Step-by-step explanation:

8 0

3 years ago