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
Pavlova-9 [17]
3 years ago
12

In a random sample of 49 audited estate tax​ returns, it was determined that the mean amount of additional tax owed was ​$3410 w

ith a standard deviation of ​$2571. Construct and interpret a​ 90% confidence interval for the mean additional amount of tax owed for estate tax returns.
Mathematics
1 answer:
GREYUIT [131]3 years ago
5 0

Answer:

$2948 and $4030

Step-by-step explanation:

The CI is sample mean +/- s/sqrt(n)

t(0.95,df=63 critical values are |t|>1.669

90% CI is 3489+/-1.669*(2595/8) since sqrt(64)=8

the interval is 541.38

round to 541

the interval is 3489+/-541

($2948,$4030) is the 90% CI for the mean.

You might be interested in
1) How is unit rate related to slope or rise over run?
quester [9]
The unit rate is a ratio of change in y and into the change on x. It can also be the rise to run or the slope.
8 0
3 years ago
The price of an item has been reduced by 35% . The original price was 91 . Find the price now
nadya68 [22]
You have to take the percentage  of the original price and subtract it to find the reduced price
8 0
3 years ago
Read 2 more answers
Make a table of values and create a line of best fit
Anni [7]
<h2>Explanation:</h2><h2></h2>

Hello! remember you have to write complete questions in order to get good and exact answers. Here I'll explain this in a general way assuming the following table:

\begin{array}{cc}x & y\\0 & 0\\1 & 2\\2 & 4\\3 & 6\\4 & 8\\5 & 10\end{array}

As you can see, x increases in steps of 1 units. So let's check the difference in y:

\bullet \ \text{From x=0 to x=1} \\ \\ \Delta y=2-0=2 \\ \\ \\ \bullet \ \text{From x=1 to x=2} \\ \\ \Delta y=4-2=2 \\ \\ \\ \bullet \ \text{From x=2 to x=3} \\ \\ \Delta y=6-4=2 \\ \\ \\ \bullet \ \text{From x=3 to x=4} \\ \\ \Delta y=8-6=2 \\ \\ \\ \bullet \ \text{From x=4 to x=5} \\ \\ \Delta y=10-8=2

So we have a constant difference and we can conclude the table represents a line. Since the line passes through then y is directly proportional to x, so we can write:

y=kx \\ \\ Where: \\ \\ k \ is \ constant \ of \ proportionality \ or \ the \ slope

Then:

k=\frac{2-0}{1-0}=2

Finally, the equation of the line is:

\boxed{y=2x}

4 0
2 years ago
The oblique pyramid has a square base with an edge length of 5 cm. The height of the pyramid is 7 cm. What is the volume of the
Mandarinka [93]

Answer:

875 cm^3

Step-by-step explanation:

Here, we want to calculate the volume of the pyramid.

To do this, we need to calculate the area of the base and then multiply this by the height of the pyramid in question

Mathematically since the base is a square, formula for the base area would be ;

L^2 = 5^2 = 125 cm ^2

Now

using the height to get the volume , we have 125 * 7 = 875 cm^3

8 0
3 years ago
Read 2 more answers
8.4 gallons of gas for $23.94. Which equation can be used to determine the price of each gallon of gas?
mojhsa [17]
Here is the equation: (gas=g)

8.5g= 23.94

All you need to do is the inverse of multiplication on the other side. (division)

23.94/8.5= 2.81647.....

g= 2.82 (rounded to the hundredths place)

I hope this helps!
~kaikers
6 0
3 years ago
Other questions:
  • Please HELP with these 3 questions
    10·1 answer
  • How do you get 67.3 degrees and 112.7 degrees from the sin(x) = .9228 ? I need to know the steps. I will also make the first ans
    13·1 answer
  • Two questions for 30 points.
    9·1 answer
  • 250 + 200h = 300 + 180h 250 + 200h = 300 + 180h − 180h − 180h 250 + 20h = 300 h = credit hours
    12·2 answers
  • What is the range of the following graph?
    6·1 answer
  • Lines p and q are parallel. Which term describes the pair of angles? Transversal that intersects parallel lines p and q. Angles
    11·1 answer
  • Solve for x<br>this is really difficult ​
    8·2 answers
  • Find the derivative of the function.<br> 3<br> f(x) = 4x + 20x4<br> f'(x)=
    15·1 answer
  • 1) The initial volume of a balloon is 0.50 L. The initial temperature of the balloon is 150K. The volume in the balloon increase
    14·1 answer
  • At LaGuardia Airport for a certain nightly flight, the probability that it will rain is 0.07 and the probability that the flight
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!