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
Talja [164]
3 years ago
11

A statistics tutor wants to assess whether her remedial tutoring has been effective for her five students. She decides to conduc

t a related samples t-test and records the following grades for students prior to and after receiving her tutoring.
Tutoring
Before After
2.4 3.1
2.5 2.8
3.0 3.6
2.9 3.2
2.7 3.5
Test whether or not her tutoring is effective at a 0.05 level of significance. State the value of the test statistic. (Round your answer to three decimal places.)
t =
Compute effect size using estimated Cohen's d. (Round your answer to two decimal places.)
d =

Mathematics
1 answer:
Snezhnost [94]3 years ago
8 0

Answer:

The test statistic value is, <em>t</em> = -5.245.

The effect size using estimated Cohen's d is 2.35.

Step-by-step explanation:

A paired <em>t</em>-test would be used to determine whether the remedial tutoring has been effective for the statistics tutor's five students.

The hypothesis can be defined as follows:

<em>H</em>₀: The remedial tutoring has not been effective, i.e. <em>d</em> = 0.

<em>Hₐ</em>: The remedial tutoring has been effective, i.e. <em>d</em> > 0.

Use Excel to perform the Paired <em>t</em> test.

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

A dialog box will open.

Select the values of the variables accordingly.

The Excel output is attached below.

The test statistic value is, <em>t</em> = -5.245.

Compute the effect size using estimated Cohen's d as follows:

\text{Cohen's d}=\frac{Mean_{d}}{SD_{d}}

                =\frac{0.54}{0.23022}\\\\=2.34558\\\\\approx 2.35

Thus, the effect size using estimated Cohen's d is 2.35.

You might be interested in
How to change 611/17 to improper fractions
Annette [7]
This is the answer ....

3 0
3 years ago
Read 2 more answers
Accounting procedures allow a business to evaluate their inventory costs based on two methods: LIFO (Last In First Out) or FIFO
ivanzaharov [21]

Answer: The FIFO method result in lower cost of inventory than the LIFO method.

Step-by-step explanation:

In the FIFO method old inventories are used to determine cost of goods sold (COGS), which result to less income because COGS is lesser, while it is greater in LIFO.

However, in LIFO, old and outdated inventories are valued lower than the present price. It not a good indicator of ending inventory value.

B. To calculate the degree of freedom of the inventory sample given: 1. 225221, 2. 119100, 3. 100113, 4. 212200, 5. 248245.

STEP 1. Find the mean or average of the samples.

Let x be the sample average, and N the sample size which is 5

x = 225221 + 119100 + 100113 + 212200 + 248245/5 = 180975.8

STEP 2. Degree of freedom Df is given as Df = N - 1

Remember, N is the sample size given as 5.

Df = 5 - 1 = 4.

CONCLUSION:

This shows that four numbers from the samples given have the freedom to vary as long as the average remains 180975.8.

8 0
3 years ago
Why does -2 to the second power equal -4 but (-2) to the second power equals 4?
kirza4 [7]
In -2^2 since the negative sign is not in parentheses you would solve it as 2×2=4 and then have the negative sign so it would be -4. With the parentheses you are saying that the term you are squaring is (-2) and two negatives make a positive so it would be (-2)×(-2)= 4.
3 0
3 years ago
Read 2 more answers
8 of 8
Alla [95]

Answer:

2.75 is the median

3 0
1 year ago
Read 2 more answers
HELP PLZ and thank you
Semmy [17]

Answer:

Step-by-step explanation:

Circle degrees total 360 .  

360 - 126 -54-54 (other side of vertical angles) equals 126 degrees left for the other two remaining sections.  

14x+4  +15x+6 =126

19x+10 = 126

29x = 116

x=4 .  answer .

3 0
3 years ago
Other questions:
  • Solve the equation g^2-12g=-36​
    14·2 answers
  • I dont understand how to find cot, sec, and csc
    15·1 answer
  • luis makes a 4% commision on his sales in a sporting goods store. For a $70 purchase, how much commision does Luis earn?
    9·1 answer
  • What is the simplified number of 105/24 or 105 over 24
    9·2 answers
  • An aluminum can is a right cylinder. Find the amount of paper needed for the can's label and the total amount of aluminum needed
    8·1 answer
  • (14+3)–7=N<br><br>Perform te indicated operations<br><br>​
    9·1 answer
  • Help Fast!!!WILL GIVE BRAINLIEST
    14·2 answers
  • Solve the system of equations using elimination.<br> 4x+3y=3<br> 4x-2y=18
    14·2 answers
  • It cost John $15.86 to buy 2.5 pounds<br> of ground beef. What was the cost per<br> pound?
    10·1 answer
  • The perimeter of a rectangle is 34 units. It’s width is 6.5 units
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!