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
Eduardwww [97]
3 years ago
5

An experiment involves selecting a random sample of 256 middle managers at random for study. one item of interest is their mean

annual income. the sample mean is computed to be $35,420 and the sample standard deviation is $2,050. what is the standard error of the mean?
Mathematics
1 answer:
Nitella [24]3 years ago
7 0
The standard error of the mean is 128.125.

The formula for standard error is:

\sigma_M=\frac{\sigma}{\sqrt{N}}

With our information, we have:

\sigma_M=\frac{2050}{\sqrt{256}}=128.125.
You might be interested in
Help with math please???
Tresset [83]

Okay, let's see...

The problem is asking for a linear equation most likely in the form of y=mx+b

y is another way to say f(x)

<em>m = slope </em>

<em>b = y intercept </em>

Let's start with the y intercept first.

Y intercept means ' When does the line touch (intercept) the y axis.

In this case, if you look at the graph, the line <em>touches </em>the y axis at -1.

-1 will replaces b

To find the slope we are going to take 2 precise points from the graph.

Lets use <em>(0,-1)</em> and <em>(-6,4) </em>

To find the slope, we're going to use \frac{(y_{2}  -y_{1} )}{(x_{2} -x_{1} )}

4 - (-1)     /     -6  - 0

Solve, our slope is 5/-6

That is our m

Our final equation is

f(x)=\frac{-5}{6} x -1

3 0
3 years ago
Help once more please
REY [17]

Answer:

84

Step-by-step explanation:

they are all equal sides so what you'd do is 28+28+28= 84

5 0
3 years ago
Read 2 more answers
From where Kiana is standing, she must look up at a 50° angle to see the top of a building. If she backs up 50 feet, she will ne
Morgarella [4.7K]
For this case, what we must do is solve the following system of equations:
 tan (50) = h / x
 tan (40) = h / (x + 50)
 Solving the system we have:
 (x + 50) * tan (40) = h
 (x) * tan (50) = h
 Matching:
 (x + 50) * tan (40) = (x) * tan (50)
 Rewriting:
 x (tan (50) - tan (40)) = 50 * tan (40)
 x = 50 * tan (40) / (tan (50) - tan (40))
 x = 118.9692621
 Substituting:
 h = (x) * tan (50)
 h = (118.9692621) * tan (50)
 h = 141.7820455
 Answer:
 
The height of the building is:
 
h = 141.7820455 ft
5 0
2 years ago
Read 2 more answers
Develop a probability model for the spinner shown.<br> Will give brainliest!
krok68 [10]

Answer:

Suppose we roll a six-sided number cube. Rolling a number cube is an example of an experiment, or an activity with an observable result. The numbers on the cube are possible results, or outcomes, of this experiment. The set of all possible outcomes of an experiment is called the sample space of the experiment. The sample space for this experiment is \displaystyle \left\{1,2,3,4,5,6\right\}{1,2,3,4,5,6}. An event is any subset of a sample space.

The likelihood of an event is known as probability. The probability of an event \displaystyle pp is a number that always satisfies \displaystyle 0\le p\le 10≤p≤1, where 0 indicates an impossible event and 1 indicates a certain event. A probability model is a mathematical description of an experiment listing all possible outcomes and their associated probabilities. For instance, if there is a 1% chance of winning a raffle and a 99% chance of losing the raffle, a probability model would look much like the table below.

Outcome Probability

Winning the raffle 1%

Losing the raffle 99%

The sum of the probabilities listed in a probability model must equal 1, or 100%.

4 0
3 years ago
I need help on #19 and 20<br> please help !!!
tekilochka [14]
        -3x - 3y > 5
-3x + 3y - 3y > 3x + 5
               -3y > 3x + 5
                -3         -3
                  y < -x - 1²/₃

The answer is C.

y < |x + 4| + 2

The answer is B.

3 0
3 years ago
Other questions:
  • Complete the table below by calculating the commission and adding it to the price of the stock.
    9·2 answers
  • X=2 y=-4 <br> y^-5<br> ___<br> X^-3
    5·2 answers
  • PLEASE HELP
    10·1 answer
  • What is the midpoint of the line segment with endpoints (–1, 7) and (3, –3)?
    7·1 answer
  • I need help please! Ashton estimates the square root of 72 in the following way: square root 72 = 2square root 36 = 2 times 6 =
    8·1 answer
  • What is the equation that matches this table?
    13·1 answer
  • Explain why angle “a” must be 135
    9·1 answer
  • Sam had 8819 grams of salt. He mixed 1715 grams of salt into a pot of soup he was cooking. Before serving the soup, he added 115
    11·1 answer
  • Fighting for my life rn
    6·1 answer
  • The equation of a line is y=6/7 x+7
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!