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
marissa [1.9K]
3 years ago
12

A data analytics firm hired by a Republican candidate running for political office wants to test whether its practices were succ

essful in increasing voter turnout among registered Republicans. The firm collected data in a random selection of cities before the candidate ran for office and then after the election. Find the test statistic and the number of degrees of freedom for an appropriate hypothesis test using the data set below. Let the difference d for each city be computed as d=after−before. Assume that the populations are normally distributed. Round the test statistic to three decimal places.

Mathematics
1 answer:
Vilka [71]3 years ago
6 0

Answer:

The practices were successful in increasing voter turnout among registered Republicans.

Step-by-step explanation:

The missing data is attached below.

The dependent t-test (also known as the paired t-test or paired samples t-test) compares the two means associated groups to conclude if there is a statistically significant difference amid these two means.

In this case a paired t-test is used to determine whether the practices were successful in increasing voter turnout among registered Republicans.

The hypothesis for the test can be defined as follows:

<em>H</em>₀: The practices were not successful in increasing voter turnout among registered Republicans, i.e. <em>d</em> ≤ 0.

<em>Hₐ</em>: The practices were successful in increasing voter turnout among registered Republicans, i.e. <em>d</em> > 0.

Use Excel to perform the paired t-test.

Go to Data → Data Analysis → t-Test: Paired Two Sample for Means

A dialog box will open.

Select the variables.

Set the Hypothesized mean difference as 0.

Press OK.

The output is attached below.

The test statistic value is, <em>t</em> = 5.409.

The degrees of freedom is, <em>df</em> = 9.

The <em>p</em>-value for he one-tailed test is, <em>p</em>-value = 0.00021.

Decision rule:

If the p-value of the test is less than the significance level then the null hypothesis will be rejected.

The p-value of the test is very small for all the commonly used significance level. The null hypothesis will be rejected.

Thus, concluding that the practices were successful in increasing voter turnout among registered Republicans.

You might be interested in
Factor <br><br> LaTeX: 7v^2+31v+12
bazaltina [42]

Answer:

(7v +3 ) ( v    + 4  )

Step-by-step explanation:

7v^2+31v+12

(7v + ) ( v    +   )

12 = 1*12

       2*6

       3*4

7* 4 + 3 = 31

(7v +3 ) ( v    + 4  )

6 0
3 years ago
Write 3/25 as a percent
8_murik_8 [283]
100/25 = 4

4*3 = 12

The answer is 12%

Hope this helps! :)
3 0
3 years ago
Can you plssss helppp
EastWind [94]
Deez nu-tz gottem lol
I looked it up your so welcome
8 0
2 years ago
I’m so confused !! PLS HELP ME, it’s due in like 5 mins ASAP
Tresset [83]

Answer:

its g

Step-by-step explanation:

8 0
3 years ago
Please answer correctly !!!!!!! Will mark a lot of points !!!!!!!!
soldi70 [24.7K]

Answer:

here it is

Step-by-step explanation:

3 0
2 years ago
Other questions:
  • The vertex form of h(x) = x2 – 14x + 6 is h(x) = (x – )2 – .
    8·2 answers
  • Find the 8th term in the geometric sequence 5,-15, 45...
    13·1 answer
  • A store buys 7 sweaters for $42 and sells them for $182. How much profit does the store make per sweater?
    8·1 answer
  • Can someone please help with this problem?​
    8·1 answer
  • Randy began completing the table below to represent a particular linear function. Write an equation to represent the
    12·1 answer
  • Which two operations will solve this equation: 4x − 5 = 1
    13·1 answer
  • Find all the zeros of the equations.<br>(x-5)(x+9)(x-3)=0​
    6·1 answer
  • It's a yes or no question​
    14·1 answer
  • Evaluate.
    12·1 answer
  • Explain how to divide when the divisor is a decimal.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!