1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
steposvetlana [31]
3 years ago
7

In statistics, what term means "a numerical range around a sample mean accompanied with a statement of how confident one is that

the true population mean lies within the interval?
Mathematics
1 answer:
Alex Ar [27]3 years ago
3 0

Answer:

Confidence Interval for the mean

Step-by-step explanation:

Confidence interval is made using the observations of a <em>sample</em> of data obtained from a population, so it is constructed in such a way, that, with a certain <em>level of confidence </em>(this is the statement mentioned in the question), that is, one could have a percentage of probability that the interval, or range around the value obtained, frequently 95%, contains the true value of a population parameter (in this case, the population mean).  

It is one way to extract information from a population using a sample of it. This kind of information is what inference statistic is always looking for.

An <u>approximation</u> about how to construct this interval or range:

  1. Select a random sample.
  2. For the specific case of a <em>mean</em>, you need to calculate the mean of the <em>sample </em>(sample mean), and, if standard deviation is unknown or not mentioned, also calculate the sample standard deviation.
  3. With this information, and acknowledged that these values follows a standard normal distribution (a normal distribution with mean 0 and a standard deviation of 1), represented by random variable Z, one can use all this information to calculate a <em>confidence interval for the mean</em>, with a certain confidence previously choosen (for example, 95%), that the population mean must be in this interval or <em>range around this sample mean.</em>

You might be interested in
Solve for a in terms of F and m: F=ma
Elena-2011 [213]
To solve for a, you must get a by itself on one side of the equation.  Now, a is "joined" to m by multiplication.  To "separate" them, use the inverse operation, division.

Divide both sides of the equation by m.

F=ma \\ \frac{F}{m}=\frac{ma}{m} \\ \frac{F}{m}=a \\ a=\frac{F}{m}
5 0
3 years ago
A shoe store uses a 50 percent markup for all of the shoes it sells. What should be the selling price of a pair of shoes that ha
Margarita [4]

Answer:

85.5

Step-by-step explanation:

57 + 57/2 = 57 + 28.5 = 85.5

5 0
3 years ago
If you have 97% in ELA, 83% in math, 87% in Science, and 67% in social studies, what is your overall score in a percentage?
Natali5045456 [20]

%66 would be the overall

5 0
3 years ago
Read 2 more answers
Use the graph to fill in the blank with the correct number.<br> f(-2)=?
leva [86]

Answer:

2

Step-by-step explanation:

In function notation, f(x) equals the y value and the x equals the x value. So this question is asking you to find the value of y when x=-2. To do this find -2 on the graph and find the point with the same x value, then find what value of y it is on. In this case, f(-2)=2.

4 0
3 years ago
Mike has 21 pounds of tomatoes and 9 pounds of mixed peppers from his garden that he will use to make salsa and tomato sauce. Th
wel

Answer:

x= 6 , y = 3

Step-by-step explanation:

x + 5y = 21

i am using trail and error method and i got the answer easily

the logic behind this is simple

the first equation is x + 5y = 21 so we can say that y  will be 5 x 1 , 5 x 2 , 5 x  3 , 5 x 4

first i did 5 x 4 = 20

x + 5 x 4 = 21

x= 1 but the equation x + y = 1 + 4 = 5  which is not equal to 9

second i tried with 5 x 3 =15

and the equation will be

x + 5 x 3 = 21

6 + 15 = 21

this time the second equation became true

x + y = 9

6 + 3 = 9

the no of pounds of salsa = 6

no of pounds of tomato = 3

8 0
2 years ago
Other questions:
  • The diagram shows the measurements of a frame into which concrete is poured to make steps. The steps are shaped like rectangular
    6·1 answer
  • Tony has 7/8 of a candy bar he wants to split the bar into servings that are 3/10 of the bar how many servings can he make
    5·1 answer
  • Please help as soon as possible
    13·2 answers
  • Please help me with the answers
    5·1 answer
  • Graph the image of the figure after a dilation with a scale factor of 3 centered at (2, −7).
    5·2 answers
  • NEED HELP!!<br> the graph shows the volume of oil in a tank at time t seconds
    11·1 answer
  • 1. In order to increase sales the price of a Concorde airliner is reduced from
    10·2 answers
  • Lucita does the division problem 3.302 + -1.27, and gets -0.026. She doesn't understand this result because she had
    6·2 answers
  • Is the U.S. ever on sale to canadians?
    13·1 answer
  • what would be the best statement about operator function of the bag class in section 3.1? group of answer choices that is an uni
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!