Answer:
, option D
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.
![\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}](https://tex.z-dn.net/?f=%5Cpi%20%5Cpm%20z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D)
In which
z is the zscore that has a pvalue of
.
From a random sample of 50 students, she found that 32 students read at least 1 book last month.
This means that ![n = 50, \pi = \frac{32}{50} = 0.64](https://tex.z-dn.net/?f=n%20%3D%2050%2C%20%5Cpi%20%3D%20%5Cfrac%7B32%7D%7B50%7D%20%3D%200.64)
90% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
Confidence interval:
![\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}](https://tex.z-dn.net/?f=%5Cpi%20%5Cpm%20z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D)
![0.64 \pm 1.645\sqrt{\frac{0.64*0.36}{50}}](https://tex.z-dn.net/?f=0.64%20%5Cpm%201.645%5Csqrt%7B%5Cfrac%7B0.64%2A0.36%7D%7B50%7D%7D)
So the correct answer is given by option D.
Three feet is equal to one yard!!
Answer:
371,593
Step-by-step explanation:
used a calculater
Answer:
-114 (The answer should be negative.)
Step-by-step explanation:
3 x -38 = -114
The pythagorean theorem states that a^2+ b^2=c^2.
Final answer: None of the above