Answer:
in psychologically stressful situations, such as sailing.
Explanation:
Malinowski was an anthropologist went to the trobriand island to study the culture there. He found out that the people there used magic as practical solution to different problems that they may be having. In sailing for instance, they used magic as a form of assistance to take care of unexpected situations even as they relied on their own skills.
In semiconductor manufacturing, wet chemical etching is often used to remove silicon from the backs of wafers prior to metallization. The etch rate is an important characteristic of this process and known to follow a normal distribution. Two different etching solutions have been compared using two random samples of 10 wafers for each solution. Assume the variances are equal. The etch rates are as follows (in ml per minute):
Solution 1 Solution 2
9.8 10.4 10.2 10.0
9.4 10.3 10.6 10.2
9.3 10.0 10.7 10.7
9.6 10.3 10.4 10.4
10.2 10.1 10.5 10.3
(a) Calculate the sample mean for solution 1.
(b) Calculate the sample standard deviation for solution 1.
(c) Calculate the sample mean for solution 2.
(d) Calculate the sample standard deviation for solution 2.
(e) Test the hypothesis
H
0
:
m
1
=
m
2
versus
H
1
:
m
1
â
m
2
.
Calculate
t
0
.
(f) Calculate a 95% two-sided confidence interval on the difference in mean etch rate.
Answer:
[tex](a)[/tex] [tex]\bar x_1 = 9.94[/tex]
[tex](b)[/tex] [tex]x_2 = 10.4[/tex]
[tex](c)[/tex] [tex]\sigma_1 = 0.395[/tex]
[tex](d)[/tex] [tex]\sigma_2 = 0.231[/tex]
(e) There is sufficient evidence to reject the claim that the mean etch rate is the same for both solutions
[tex](f)[/tex] [tex]-0.75644 < \mu_1 - \mu_2 < -0.1556[/tex]
Explanation:
Given
Solutions 1 and 2
Solving (a): Mean of solution 1
For Solution 1, we have the following data:
[tex]9.8\ 10.4\ 9.4\ 10.3\ 9.3\ 10.0\ 9.6\ 10.3\ 10.2\ 10.1[/tex]
The sample mean is calculated as:
[tex]\bar x = \frac{\sum x}{n}[/tex]
Where
[tex]n_1 = 10[/tex]
So, we have:
[tex]\bar x_1 = \frac{9.8+ 10.4+ 9.4+ 10.3+ 9.3+ 10.0+ 9.6+ 10.3+ 10.2+ 10.1}{10}[/tex]
[tex]\bar x_1 = \frac{99.4}{10}[/tex]
[tex]\bar x_1 = 9.94[/tex]
Solving (b): Mean of Solution 2
For Solution 1, we have the following data:
[tex]10.2\ 10.0\ 10.6\ 10.2\ 10.7\ 10.7\ 10.4\ 10.4\ 10.5\ 10.3[/tex]
The sample mean is calculated as:
[tex]\bar x = \frac{\sum x}{n}[/tex]
Where
[tex]n_2 = 10[/tex]
So, we have:
[tex]x_2 = \frac{10.2+ 10.0+ 10.6+ 10.2+ 10.7+ 10.7+ 10.4+ 10.4+ 10.5+ 10.3}{10}[/tex]
[tex]x_2 = \frac{104}{10}[/tex]
[tex]x_2 = 10.4[/tex]
Solving (c): Sample Standard Deviation of solution 1
This is calculated as:
[tex]\sigma_1 = \sqrt{\frac{\sum (x-\bar x_1)^2}{n_1-1}}[/tex]
This gives:
[tex]\sigma_1 = \sqrt{\frac{(9.8 - 9.94)^2+ (10.4- 9.94)^2+ (9.4- 9.94)^2+................+ (10.2- 9.94)^2+ (10.1- 9.94)^2}{10 - 1}}[/tex]
[tex]\sigma_1 = \sqrt{\frac{1.404}{9}}[/tex]
[tex]\sigma_1 = \sqrt{0.156}[/tex]
[tex]\sigma_1 = 0.39496835316[/tex]
[tex]\sigma_1 = 0.395[/tex] --- approximated
Solving (d): Sample Standard Deviation of solution 2
This is calculated as:
[tex]\sigma_2 = \sqrt{\frac{\sum (x-\bar x_2)^2}{n_2-1}}[/tex]
So, we have:
[tex]\sigma_2 = \sqrt{\frac{(10.2 - 10.4)^2+ (10.0 - 10.4)^2+ (10.6 - 10.4)^2+ (10.2 - 10.4)^2+.......................+ (10.3 - 10.4)^2}{10-1}}[/tex]
[tex]\sigma_2 = \sqrt{\frac{0.48}{9}}[/tex]
[tex]\sigma_2 = \sqrt{0.05333333333}[/tex]
[tex]\sigma_2 = 0.23094010766[/tex]
[tex]\sigma_2 = 0.231[/tex]
Solving (e): Test the hypothesis
[tex]H_0: \bar x_1 = \bar x_2[/tex]
[tex]H_1: \bar x_1 \ne \bar x_2[/tex]
Start by calculating pooled standard deviation
[tex]s_p = \sqrt{\frac{(n_1 - 1)*\sigma_1^2 + (n_2 - 1)*\sigma_2^2}{n_1 + n_2 -2}[/tex]
[tex]s_p = \sqrt{\frac{(10 - 1)*0.395^2 + (10 - 1)*0.231^2}{10+ 10-2}[/tex]
[tex]s_p = \sqrt{\frac{1.884474}{18}[/tex]
[tex]s_p = \sqrt{0.104693}[/tex]
[tex]s_p = 0.324[/tex]
Calculate test statistic
[tex]t = \frac{\bar x_1 - \bar x_2}{s_p\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}[/tex]
[tex]t = \frac{9.94 - 10.4}{0.324 * \sqrt{\frac{1}{10} + \frac{1}{10}}}[/tex]
[tex]t = \frac{-0.46}{0.324 * \sqrt{0.2}}[/tex]
[tex]t = \frac{-0.46}{0.324 * 0.4472}[/tex]
[tex]t = \frac{-0.46}{0.1448928}[/tex]
[tex]t = -3.175[/tex]
Calculate the degree of freedom
[tex]df = n_1 + n_2 - 2[/tex]
[tex]df = 10+10 - 2[/tex]
[tex]df = 18[/tex]
The p value is the in the column title of the student t distribution in row 18
[tex]p = 002621[/tex]
The p value is less than the significance level (0.05).
i.e.
[tex]p < 0.05[/tex]
So: Reject the null hypothesis
Solving (f): 95% two-sided confidence interval
[tex]c = 95\%[/tex]
Calculate the degree of freedom
[tex]df = n_1 + n_2 - 2[/tex]
[tex]df = 10+10 - 2[/tex]
[tex]df = 18[/tex]
Calculate [tex]\alpha[/tex]
[tex]\alpha = (1 - c)/2[/tex]
[tex]\alpha = (1 - 95\%)/2[/tex]
[tex]\alpha = (0.05)/2[/tex]
[tex]\alpha = 0.025[/tex]
Using student t distribution
[tex]t_{\alpha/2} = 2.101[/tex]
Calculate margin of error (E)
[tex]E = t_{\alpha/2} * s_p * \sqrt{\frac{1}{n_1} + \frac{1}{n_2}}[/tex]
[tex]E = 2.101 * 0.324 * \sqrt{\frac{1}{10} + \frac{1}{10}}[/tex]
[tex]E = 2.101 * 0.324 * \sqrt{0.2}[/tex]
[tex]E = 0.3044[/tex]
The boundaries of the confidence are:
[tex](\bar x_1 - \bar x_2) -E[/tex] [tex]= (9.94- 10.4) - 0.3044 = -0.7644[/tex]
[tex](\bar x_1 - \bar x_2) + E[/tex] [tex]= (9.94- 10.4) + 0.3044 = -0.1556[/tex]
The confidence interval is:
[tex]-0.75644 < \mu_1 - \mu_2 < -0.1556[/tex]
After the election of 1824, Andrew jackson viewed john quincy
Which of the following describes how many of the colonies responded after the Boston massacre
Answer:
if these are the answer Boston townspeople attacked and killed five British soldiers.
British soldiers attacked and killed five Boston townspeople.
British soldiers attacked Boston townspeople, who shot five soldiers dead.
Boston townspeople attacked British soldiers, who shot five colonists dead.
Explanation:
then the fourth on
Whether research results obtained in one setting will apply to another setting, is the accepted definition of: in g
Answer:
External validity
Explanation:
External validity: In research, the term "external validity" is described as the extent or degree to which a researcher can generalize his or her findings to distinct groups of individuals, measures, and situations.
-External validity of specific research is considered as good or high when it can be applicable to some other people, setting, times, and experiments whereas it is considered as low when it can't be applied to any other situation.
In the question above, the given statement represent external validity.
The territory acquired in the Mexican-American War is called the
Answer:
It ended the war, and Mexico recognized the Mexican Cession, areas not part of disputed Texas but conquered by the U.S. Army. These were northern territories of Alta California and Santa Fe de Nuevo México. ... The question of how to treat the new acquisitions also intensified the debate over slavery in the United States
Explanation:
i hope you understand better
Answer:
its the second drop down
Explanation:
How has Mexico City's government tried to address its air pollution problem?
A.
It has built water sanitation plants in the city.
B.
It has limited mining in the mountain regions.
C.
It has banned planting trees around the city.
D.
It has restricted the use of automobiles in the city.
Answer:
A.
Explanation:
What country in asia is located farthest north?
Which of the following is an accurate statement about the voter turnout rate in the United States?
a. There is usually no difference in participation rates between presidential and midterm elections.
b. Presidential election years usually have significantly higher turnout than in midterm election years
c. Voters are more likely to vote in congressional races in midterms than when presidents are running.
d. More voters turn out to vote in elections where less money is spent to advertise campaigns.
Answer:
c
Explanation:
The hyperfocus on crime among athletes is limited to what two sports?
The correct answer to this open question is the following.
Unfortunately, you did attach further context or references.
However, we can comment on the following.
The hyperfocus on crime among athletes is limited to these two sports: football and basketball.
The reason why is that these two sports produce too many "stars" that have too much notoriety for their conduct and behaviors. Some of the athletes that participate in these professional sports got too much attention from the media and the public and are considered famous. This popularity often produces that they lost the ground and act in incongruent ways, many times making the worts decisions that impact their careers by the mistakes they make.
As the public figures they are, their behavior immediately makes the news, and their poor judgment often brings negative consequences to their careers.
Which of the following is MOST dependent on the ability to exchange currencies?
A investing in capital goods
B
protecting domestic industries
С
encouraging entrepreneurship
D
engaging in international trade
When looking for pre-approval on a car loan you should
NOT...
PLEASE HELP
Answer:
DO NOT. get a loan from the car dealer directly to keep things simple
Explanation:
BUT YOU SHOULD...compare pre-approval offers and select the one that is best for you.
and habibi your beautiful
What were some of the reasons that South Carolina left the Union?
Answer:
South Carolina withdrew from the United States on December 20, 1860. At the time Abraham Lincoln was trying to stop slavery from spreading to the Western territories. Texas, Mississippi, Georgia and South Carolina all issued additional documents, usually referred to as the "Declarations of Causes" which explains their decisions to leave the Union.
Explanation:
Hopefully this helps :) I tried my best to use all my knowable on this topic.
100 pionts HURRY??!?!?!?
How did the United States and Western European nations try to help Germany recover from economic collapse after World War I?
Answer:
The United States and Germany signed a separate peace treaty in 1921 and a trade treaty in 1923. The Dawes Plan presented in 1924 was designed to help Germany pay its World War I reparations debt.
Please help me i need the right answer fast and please dont guess thanks <3
Answer:
The answer to this question is True
The _____ is the final arbiter of whether actions of the state legislature, state agencies, counties, cities, or other government bodies are acceptable under the Texas Constitution or not. A. Court of Record B. Court of Appeals C. Texas Court of Criminal Appeals D. Texas Supreme Court
Answer:
The correct answer is - option D. Texas Supreme Court.
Explanation:
Texas supreme court is the supreme among all the courts and the final appeals are made here including criminal and civil appeals. These courts also hear writs and give their judgment on the writs and appeals if the particular action is against the constitution or not.
This court is final to see if the state legislature, state agencies, counties, cities, or other government bodies are acceptable under the Texas Constitution
As the final arbiter of the law, the Court is responsible for ensuring equal justice under the law and serves as the Constitution's protector and translator.
Is the Supreme Court the last word?As the final arbitrator of the law, the Court is tasked with assuring the American people of the promise of equal justice under law, and so serves as the Constitution's custodian and translator.
According to Chief Justice Charles Evans Hughes, the Supreme Court is "distinctly American in thought and function."
Thus, Option D is the correct blank.
For more information about the Final arbiter refer to the link:
https://brainly.com/question/4522667
Example of fair discrimination
*
Answer:
Explanation:
Workplace discrimination is to show favour, prejudice or bias for or against a person on any arbitrary grounds, for example on the basis of race, gender, sex, pregnancy, marital status, family responsibility, ethnic or social origin, colour, sexual orientation, age disability, religion, HIV status, conscience, belief,
What are the roles and duties of the secretary of the Senate? Check all that apply.
maintaining all Senate documents
ensuring that procedures and rules are followed
setting meeting times for senatorial secessions
keeping a journal of all events that take place in the Senate
assuming the duties of the Senate president in the event of absence, death, or disability
Answer:
maintaining all Senate documents
ensuring that procedures and rules are followed
keeping a journal of all events that take place in the Senate
a b d
Explanation:
PLEASE MARK BRAINLIEST!!!!!!!!!!!!!Answer:
maintaining all Senate documents
ensuring that procedures and rules are followed
keeping a journal of all events that take place in the Senate
what is one true statement about money ?
Answer:
Explanation:
Answer:
money is a mean of exchange of good and services.
1.money is mobile
2.money is transparent
Which of the is not a characteristic that helps to classify rocks?
Answer:
Where is a pic... Rocks are "earthly" or "organic" you could say.
Explanation:
What does the abbreviation SAR stand for?
Answer:
Specific Absorption Rate
Specific Absorption Rate (SAR) For Cell Phones: What It Means For You.
Explanation:
Most Latin Americans live in big cities. These Urban areas are mostly found where?
A.
Deserts
B.
Mountain Ranges
C.
Forests
D.
Coasts
Answer:
Coasts
Explanation:
People need a water source to live this is why there are more cities in just about any country by the ocean or major rivers. Cities may be in the Mountain Rangers or Forests but that is just a small percentage of cities. (Good example of this is Mexico City it was originally founded on top of a lake)
Add the percentage given after each number to that number
(a) 5 085+27%
Answer: 6457.95. plz mark me brainliest
Explanation: 27% of 5085 is 1372.95 and 5085+1372.95=6457.95
plz mark me brainliest.
How to mark brainliest:
Click on the crown on the bottom right of an answer. If there is no crown reload. To find the crown you have to have 2 people who answered. plz mark me brainliest.
2) Who were the main framers of the Constitution of India ?
Answer:
Benegal Narsing Rau I think
Discuss the roles of the three spheres of government in a democratic country
Answer search it now it shows best result
Explanation:
How did people resist the Holocaust?
Answer:
by measuring it
Explanation:
........
HELP IF U HELP U GET BRAINLIEST ANSWER THIS IS 30 POINTS
Answer:
introducing tax cuts to stimulate the economy
what are the disadvantages of bartering
Answer:
Explanation:
One disadvantage is Lack of Divisibility.
Why are people are more serious in population management in comparison of previous day ?
Answer:
Because of the rapid growth increase was mainly caused by a decreasing death rate (more rapidly than birth rate), and particularly an increase in average human age.
Explanation:
How do researchers identify the major problems and functions of the brain? Explain four methods
Answer:
EEG, PET, MRI, and fMRI.
True or False: Disease in the circulatory system does not affect other organ systems, such as the muscular system. *
True
False
Answer:
False
Basic fact:
the circulatory system is a system that contains the heart and the blood vessels and moves blood throughout the body
Explanation:
since it is a heart and blood vessel it moves blood around the body
if there is a disease in there it spreads all around the body through the blood