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
Ne4ueva [31]
2 years ago
5

In a study, researchers wanted to measure the effect of alcohol in the development of the hippocampal region in adolescents. The

researchers randomly selected 30 adolescents with alcohol use disorders to compare the hippocampal volumes in the alcoholic adolescents to the normal volume of 9.08 cubic centimeters. An analysis of the sample data revealed that the hippocampal volume was distributed normally with a mean of 8.25 cm^3 and a standard deviation of 1.67 cm^3.
a. The researchers wanted to determine if the hippocampal values in the alcoholic adolescents were different from the normal volume of 9.08 cm. Write the null and alternative hypotheses for this question. Use a t critical value of 2.045.
b. What are the assumptions (conditions) of this test? Are the assumptions met for this sample?
c. Perform the appropriate test including the formula that you used, the calculated value of the t-statistic, and the t-critical you compared your t-statistic to using a significance level of .05. Then, state your conclusion to the test.
d. Calculate and interpret the 95% confidence interval for the test. Use a t critical of 2.045.
Mathematics
1 answer:
lbvjy [14]2 years ago
4 0

Answer:

Kindly check explanation

Step-by-step explanation:

Given :

Sample size, n = 30

Tcritical value = 2.045

Null hypothesis :

H0: μ = 9.08

Alternative hypothesis :

H1: μ≠ 9.08

Sample mean, m = 8.25

Samole standard deviation, s = 1.67

Test statistic : (m - μ) ÷ s/sqrt(n)

Test statistic : (8.25 - 9.08) ÷ 1.67/sqrt(30)

Test statistic : - 0.83 ÷ 0.3048988

Test statistic : - 2.722

Tstatistic = - 2.722

Decision region :

Reject Null ; if

Tstatistic < Tcritical

Tcritical : - 2.045

-2.722 < - 2.045 ; We reject the Null

Using the α - level (confidence interval) 0.05

The Pvalue for the data from Tstatistic calculator:

df = n - 1 =. 30 - 1 = 29

Pvalue = 0.0108

Reject H0 if :

Pvalue < α

0.0108 < 0.05 ; Hence, we reject the Null

You might be interested in
Can you name Six congruent isosceles triangles? I really need help?
Digiron [165]
Six congruent isosceles triangles would be named as their letters (must be in order!) then isosceles.

Please message me!!
8 0
2 years ago
Which of the following systems has infinitely many solutions?
stich3 [128]

Answer:

d

Step-by-step explanation:

4 0
2 years ago
Mr. Jones has 3/4 cup of fertilizer. He will use a 1/8 cup measuring scoop to pour all of the fertilizer onto his plants. How ma
dmitriy555 [2]

Answer:

6 times

Step-by-step explanation:

We will have to divide in order to solve this problem.

\frac{3}{4}÷\frac{1}{8}

We will have to find the reciprocal of 1/8, which is basically flipping it, so it is 8.

After, we will have to multiply 3/4x8. The product would come out as 24/4, and if you simplify it, the answer will be 6 times.

6 0
2 years ago
Jason agreed to make 12 payments of $38.50 to buy a new T.V. SO far he has made 8 payment. How much more money does he owe?
alexira [117]

Answer:

154$

Step-by-step explanation:

8 0
2 years ago
Please look at number 10. from the slope and write the equation for me
kompoz [17]

Answer:

y = 8x + 38

Step-by-step explanation:

To find the slope we set up y = mx + b and plug m (our slope) in and then plug in the point into x and y to find b (our y-intercept)

   y = mx + b

   y = 8x + b

   6 = 8(-4) + b

   6 = -32 + b

+32   +32

 38 = b

So using our slope and our intercept we have our slope intercept

y = mx + b

y = 8x + 38

Hope this helps :)

7 0
3 years ago
Read 2 more answers
Other questions:
  • What is the standard form of the line through the given point:<br> (3,5), with slope = -3
    7·1 answer
  • Please help me ASAP!!!
    12·1 answer
  • A plane is an undefined term because it
    13·1 answer
  • The young wizard, Darpinido, got 16 dragons and 12 griffins for his birthday. But his sister, Ingrid, left the gate open and mor
    6·2 answers
  • Given the lease terms below, what monthly lease payment can you expect on this vehicle?
    13·2 answers
  • Write a rule for finding the value of any base with an exponet of 0
    7·1 answer
  • The air conditioning unit for marcus building has the shape of a cube and has a volume of 0.512 cubic meters.This air conditione
    13·1 answer
  • What is the value of h?
    9·1 answer
  • Drag the number to each box to match the expression on the left to its estimate
    6·1 answer
  • Not sure how to do this
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!