Answer:
the answer is 8, the distance between -11 and -3 is 8
Step-by-step explanation:
if you count the between the numbers it's a total of 8
Answer:
b
Step-by-step explanation:
Answer:
a) 272 used at least one prescription medication.
b) The 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication is (85.6%, 87.6%).
Step-by-step explanation:
Question a:
86.6% out of 3149, so:
0.866*3149 = 2727.
272 used at least one prescription medication.
Question b:
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.
In which
z is the z-score that has a p-value of
.
For this problem, we have that:
90% confidence level
So
, z is the value of Z that has a p-value of
, so
.
The lower limit of this interval is:
The upper limit of this interval is:
For the percentage:
0.856*100% = 85.6%
0.876*100% = 87.6%.
The 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication is (85.6%, 87.6%).
Using the combination formula, it is found that there are 70 ways in which the four sales representatives can be chosen.
The order in which the representatives are chosen is not important, hence the <em>combination formula </em>is used to solve this question.
<h3>What is the combination formula?</h3>
is the number of different combinations of x objects from a set of n elements, given by:
![C_{n,x} = \frac{n!}{x!(n-x)!}](https://tex.z-dn.net/?f=C_%7Bn%2Cx%7D%20%3D%20%5Cfrac%7Bn%21%7D%7Bx%21%28n-x%29%21%7D)
In this problem, 4 representatives are chosen from a set of 8, hence:
![C_{8,4} = \frac{8!}{4!4!} = 70](https://tex.z-dn.net/?f=C_%7B8%2C4%7D%20%3D%20%5Cfrac%7B8%21%7D%7B4%214%21%7D%20%3D%2070)
There are 70 ways in which the four sales representatives can be chosen.
To learn more about the combination formula, you can take a look at brainly.com/question/25821700
Step-by-step explanation:
Tahukah kamu, mengapa motor berhenti di depan lampu merah?
karena motornya direm. Coba kalau nggak direm bisa bahaya tuh.
Tebak binatang apa yang jago renang?
Bebek. Kalau ikan bukan renang tapi menyelam
Kenapa di rel kereta api ditaruh batu?
Soalnya kalau ditaruh duit nanti pada diambil.