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
Orlov [11]
3 years ago
9

Individuals filing federal income tax returns prior to March 31 received an average refund of $1056. Consider the population of

"last-minute" filers who mail their tax return during the last five days of the income tax period (typically April 10 to April 15).
a. A researcher suggests that a reason individuals wait until the last five days is that on average these individuals receive lower refunds than do early filers. Develop appropriate hypotheses such that rejection of H0 will support the researcher’s contention.
b. For a sample of 400 individuals who filed a tax return between April 10 and 15, the sample mean refund was $910. Based on prior experience a population standard deviation of σσ = $1600 may be assumed. What is the p-value?
c. At αα = .05, what is your conclusion?
d. Repeat the preceding hypothesis test using the critical value approach.
Mathematics
1 answer:
Sholpan [36]3 years ago
6 0

Answer:

Step-by-step explanation:

(A) Develop appropriate hypotheses such that the rejection of H0 will support the researcher's contention.

What is the researcher's contention?

The researcher's contention is that late filers receive lower refunds than early filers. Hence, the researcher's contention will be the alternative hypothesis; since the rejection of H0 will imply the acceptance of Ha (the alternative hypothesis).

To this regard, the appropriate hypotheses developed are:

H0: Late filers receive HIGHER refunds than early filers

H1: Late filers receive lower refunds than early filers

The rejection of H0 will lead to the acceptance of H1; which is in line with the researcher's contention/claim.

You might be interested in
I need answers to all of these. Please help!! I suck at math..
RSB [31]
1)  (-4) + (-9) = -13 

2) 5 + (-12) = -7 

3) -6 + 5 = -1 

4) -7 + 7 = 0 

<span>5)  -7 + 2 ___ 3 + (-9)

       - 5  ____    - 6 

</span>-7 + 2  >  3 + (-9)

6)  <span>4 + (-8) ___ 6 + (-8) + (-6)  

     - 4 ____    - 8 

</span><span>4 + (-8) >  6 + (-8) + (-6)

7)  </span><span>$66

8)  </span><span>-$12
</span>
6 0
3 years ago
Determine if b is a linear combination of a1 a2, and a3. a1 = [ 1 -2 0 ], a2 = [ 0 1 3 ], a3 = [ 6 -6 18 ], b = [ 2 -2 6 ] Choos
marysya [2.9K]

Answer: Vector b is not a linear combination

Step-by-step explanation:

First of all we put the vectors in terms of different variables, such as:

a1(1,-2,0)=(a,-2a,0);

a2(0,1,3)=(0,b,3b);

a3(6,-6,18)=(6c,-6c,18c);

To know that a vector is a linear combination we need to express it like a sum of other different vectors.

(2,-2,6)=(a,-2a,0)+(0,b,3b)+(6c,-6c,18c)

(2,-2,6)=(a+0+6c,-2a+b-6c,0+3b+18c)

We express this sum like a system of equations.

a+6c=2

-2a+b-6c=-2

3b+18c=6

We solve this system of equations and we can note that the system don't have a solution, so the vector b is not a linear combination of a1, a2, and a3.

8 0
3 years ago
Read 2 more answers
What is 2,912 rounded to the nearest thousand
FrozenT [24]

Answer:

3,000

Step-by-step explanation:

Find the number in the thousand place  2  and look one place to the right for the rounding digit  9 . Round up if this number is greater than or equal to  5  and round down if it is less than  5 .

5 0
3 years ago
Read 2 more answers
Triangle RSV is congruent to triangle TVS. Find x and y.
inn [45]

If these triangles are congruent, then side RS is congruent to side TV and that means that y = 4 - x. If y = 4-x, we can sub that into the next equation where side RV = side ST and 1 = 4x - y. If y = 4-x, we sub in accordingly to get 1 =4x - (4 - x). That simplifies to 1 = 4x - 4 + x which is, combining like terms, 5 = 5x. That means that x = 1. If x = 1, and y = 4 - x, then y = 4 - 1 and y = 3. There you go!

8 0
3 years ago
Read 2 more answers
What is the standard form of -5a(7) + 4a(2)
Bas_tet [7]
-5a(7) + 4a(2) \\ \\ -35a + 4a \times 2 \\ \\ -35a + 8a \\ \\ -27a \\ \\ Answer: \fbox {-27a}
8 0
3 years ago
Other questions:
  • △POQ~△ROS. Identify the coordinates of S and the scale factor. HELP ASAP!!
    13·1 answer
  • Help me on this too, 7 5/10-1 9/10
    5·2 answers
  • Lee's fifth-grade class has 1.4 times as many students as Fred's. If there are a total of 60 students , how many students does F
    6·1 answer
  • Does 10.5, 36, 50 form a right triangle
    11·2 answers
  • 33.32 divided 9.8 plsssssss helpppppppp showww workkk
    11·1 answer
  • Find the area of the circle.<br> Use 3.14 for it.<br> O<br> d = 10 cm<br> A = [?] cm2<br> A=Tr2
    11·1 answer
  • The graph of y = x2 - 4x is shown on the grid.
    11·1 answer
  • The question is where did they go wrong with the equation: 2(s-5)=2(s+5)
    6·1 answer
  • Help me, please ist question 1
    13·2 answers
  • A water tank in the shape of an inverted circular cone has a base radius of 3 m and height of 7 m . If water is being pumped int
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!