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
HI PLZ HELPI NEED AN ANSWER!! (And will mark brainliest if a legit answer thanks)
trapecia [35]

Option 3: a 90 degree rotation clockwise

You can tell that it is 90 degrees because the original started completely in quadrant 2 and the final image is completely in quadrant 1. If it was only rotated 45 degrees the final image would be part in quadrant 2 and part in quadrant 1. It was rotated clockwise because that is the way a clock goes.

Hope this helps! ;)

6 0
3 years ago
HURRY UP I NEED THE ANSWER
vladimir1956 [14]

Answer:

g(2) = 2

Step-by-step explanation:

<u><em>Explanation:-</em></u>

Given that g(x) = \frac{-1}{2} x + 3

Put x =2

               g(2) = \frac{-1}{2} (2) + 3

                       = -1+3

                       = 2

               g(2) = 2

5 0
2 years ago
Which equation represents the graph of the linear function?
forsale [732]
I think you forgot to attach the graph along with the question. I am answering the question based on my knowledge and research. "y = −2x − 1" is the one equation among the following choices given in the question that <span>represents the graph of the linear function. The correct option among all the options that are given in the question is option "B".</span>
7 0
3 years ago
Korede and Zahir were comparing their money amounts. Korede had $4.05, and Zahir had $5.04. Who had more money?
RSB [31]

Answer:

Zahir.

Step-by-step explanation:

Zahir has 98p more money than Korede.

5 0
3 years ago
Read 2 more answers
5) Kareem Abdul-Jabbar holds the NBA record for the most points scored in a
serious [3.7K]

Answer:

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • Mrs. Ibarra wants to create a right triangle for a geometry test. She plans to use 15, 36, and 41 as side lengths. Which stateme
    7·1 answer
  • How do I find the area???
    14·1 answer
  • Solve the equation:<br><br> 3x-5 = 19-x
    12·1 answer
  • This figure is made up of two rectangular prisms.
    5·1 answer
  • Which answer best explains how to solve this problem?
    11·1 answer
  • What is the unit rate, expressed in kilometers per minute?
    14·2 answers
  • Which time period represents a constant rate of change? A) 0 minutes to 10 minutes B) 5 minutes to 10 minutes C) 5 minutes to 15
    10·2 answers
  • Which figure always has exactly one line of symmetry?
    14·1 answer
  • zaheeda scored 9 goals in netball matches .At this rate , about how msny goals will she score in ten games​
    15·2 answers
  • Area of composite figures worksheet. How do you solve it. Step-By-Step​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!