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
USPshnik [31]
3 years ago
12

Alisha is conducting a paired differences test for a "before (B score) and after (A score)" situation. She is interested in test

ing whether the average of the "before" scores is higher than that of the "after" scores.
(a) To use a right-tailed test, how should Alisha construct the differences between the "before" and "after" scores?
(b) To use a left-tailed test, how should she construct the differences between the "before" and "after" scores?
Mathematics
1 answer:
madreJ [45]3 years ago
5 0

Answer:

Step-by-step explanation:

The question says that Alisha is interested in testing whether the average (mean) of the B scores is GREATER THAN the average of the A scores.

Normally, a right-tailed test is used to conduct such experiment because Alisha is comparing in the positive - greater than.

Since we weren't given any figures in the question, we'll use algebra.

Hence,

Let the mean of the B scores be X

and the mean of the A scores be Y

(A) In this case, Alisha wants to know if X is greater than Y. She'll construct the difference between both means thus:

Null hypothesis: X is greater than Y

Alternative hypothesis: X is not greater than Y

Remember that the null hypothesis is the fact which the researcher is testing or which he/she wants to ascertain or prove WHILE the alternative hypothesis is the negating event.

(B) For a left-tailed test to be conducted, Alisha's research statement will be rephrased thus:

Alisha is interested in testing whether the average of the A scores is LESS THAN the average of the B scores.

The hypothesis statement will now be:

Null hypothesis: Y is less than X

Alternative hypothesis: Y is not less than X

As the distinction between both types of hypothesis test has been established, in each case, succeeding statistical-analysis steps are the same.

Alisha can then perform her regression analysis with the numerical data given.

You might be interested in
Which of the following is equivalent to x^-1/2<br><br>1) -1/2x <br>2) -√x<br>3) 1/√x<br>4) -1/2x
irina [24]

Answer:

Option (3) is correct.

Step-by-step explanation:

We need to find the expression that is equivalent to x^{-1/2}.

The property is : x^{-a}=\dfrac{1}{x^a}

Here, a = 1/2

So,

x^{-1/2}=\dfrac{1}{x^{1/2}}

We know that, x^{1/2}=\sqrt{x}

\dfrac{1}{x^{1/2}}=\dfrac{1}{\sqrt{x} }

So, x^{-1/2} is equivalent to \dfrac{1}{\sqrt{x} }

Hence, the correct option is (3).

3 0
3 years ago
What is the correct method of recording numerical information from an experiment?
olga55 [171]

Answer:

The correct method for recording numerical information from an experiment is the quantitative method.

Step-by-step explanation:

This method represents the way of recording that tracks variables (sometimes more than one) and how they interact with each other. This will help to establish relationship within your experiment.

8 0
2 years ago
Read 2 more answers
Dante is baking two different recipes, cookies and brownies. The cookie recipe requires 1.5 cups of sugar, and the brownie recip
skad [1K]

Answer:

2.75 cups of sugar

Step-by-step explanation:

Hello!

To find the total amount of sugar Dante needs we need to add the amount need for each recipe

Cookie recipe needs 1.5 cups

Brownie recipe needs 1.25 cups

1.5 + 1.25 = 2.75 cups of sugar

The answer is 2.75 cups of sugar

Hope this helps!

3 0
2 years ago
Read 2 more answers
Write the equation in slope-intercept form using: m= -2/3 and (-6,1)
kari74 [83]
Formula is y = mx + b

Answer y = - 2/3x - 3
8 0
2 years ago
A seal went 25 feet below sea level to catch a fish. A sea lion dove 10 feet less than three times as deep as the seal to catch
vfiekz [6]

Answer:

65 feet below sea level.

Step-by-step explanation:

With the information provided, we can create the following equation for the position of the sea lion (p)

p = 3x - 10

In this equation, x would be the final position of the seal when it caught the fish. Since we are told that the seal's position is 25 feet below sea level then we can plug in this value as x and solve for p...

p = (3 * 25) - 10

p = 75 - 10

p = 65

Finally, we can see that the sea lion's position is 65 feet below sea level.

7 0
2 years ago
Read 2 more answers
Other questions:
  • What is the slope of the line represented by the equation 5 y-10 x = -15?
    12·1 answer
  • How many cups are there in a quart of water?
    6·1 answer
  • If the mean score on a stress test is 5, the standard deviation is 2, and the distribution is normal, what would be the mean val
    15·1 answer
  • Can someone please answer. There is one problem. There's a picture. Thank you!!
    15·1 answer
  • What is the standard form of x/4 - y/3 =1 and 5/x - 2/y=7.
    15·1 answer
  • The length of the rectangle is 3m
    7·1 answer
  • Hurrrrryyyyyyyyy A triangle is reduced.
    6·2 answers
  • The endpoint of two rays forming an angle is called what?
    7·2 answers
  • You and a friend were invited to a party you both were asked to bring pizzas and chips
    11·2 answers
  • 1 is the additive identity of any real number True or False​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!