Solve the following inequality : -6x-9 less than it equal to 3

Construct the 90% confidence interval for the proportion of students at the college who have completed their required English 10

igomit [66]

Answer:

The confidence interval has an lower limit of $\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = \pi - 1.645\sqrt{\frac{\pi(1-\pi)}{n}}$ and an upper limit of $\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = \pi + 1.645\sqrt{\frac{\pi(1-\pi)}{n}}$ , in which $\pi$ is the sample proportion and $n$ is the size of the sample.

Step-by-step explanation:

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 z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a p-value of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = \pi - 1.645\sqrt{\frac{\pi(1-\pi)}{n}}$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = \pi + 1.645\sqrt{\frac{\pi(1-\pi)}{n}}$

The confidence interval has an lower limit of $\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = \pi - 1.645\sqrt{\frac{\pi(1-\pi)}{n}}$ and an upper limit of $\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = \pi + 1.645\sqrt{\frac{\pi(1-\pi)}{n}}$ , in which $\pi$ is the sample proportion and $n$ is the size of the sample.

8 0

4 years ago

Pleas answer the question in the attached file.

ch4aika [34]

A. My best friends, whose name is Laura, is in law school.

You know this because, if you were to take out the part in between the commas, the sentence would still make sense. It just adds additional detail.

8 0

3 years ago

Read 2 more answers

2. One card is selected at

Inessa05 [86]

Answer:selecting 6 or 7 in the first draw and 8 or 9 in the second draw, no replace?

Step-by-step explanation:What is the probability of selecting a king from the first card and a queen from the second ... Originally Answered: Two cards are drawn successively from a pack of 52 cards. ... I. With replacement : Probability that the first card drawn is a king is . ... of selecting 6 or 7 in the first draw and 8 or 9 in the second draw, no replace?

6 0

3 years ago

Can someone help me answer these!

Marysya12 [62]

Answer:

I believe it would most likely be the last answer

Step-by-step explanation:

I am not sure what it is showing though. All i see is that it is emphisising the multiplication property with the use of perenthisis.

3 0

3 years ago

A salesman priced a four wheeler at $3,500 the first day it was on the market. The second day he reduced the price by 10%. What

Karo-lina-s [1.5K]

Answer:

$3,150

Step-by-step explanation:

To find the sale price, multiply the original price ($3,500) by 0.90. This 0.90 comes from subtracting 10% from 100% and converting the result to the decimal fraction 0.90.

0.90($3,500) = $3,150

3 0

3 years ago