The manufacturer of a new racecar engine claims that the proportion of engine failures due to overheating for this new engine, (p1), will be no higher than the proportion of engine failures due to overheating of the old engines, (p2). To test this statement, NASCAR took a random sample of 120 of the new racecar engines and 115 of the old engines. They found that 77 of the new racecar engines and 44 of the old engines failed due to overheating during the test. Does NASCAR have enough evidence to reject the manufacturer's claim about the new racecar engine? Use a significance level of α=0.1 for the test.

Step 4 of 6 :  

Compute the value of the test statistic. Round your answer to two decimal places.

Other correct answers: v v v v v v v v v v v v v v v

Part 1: H0: p1−p2 ≤ 0
Ha: p1−p2 > 0

Part 2: pˆ1=0.058, pˆ2=0.035

Part 3: p-bar‾= 0.047

^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^

In a short paragraph each, explain the importance of each of these court cases.

Morrissey v Brewer                           Gregg v GA                            Atkins v VA   

Roper v Simmons                            Estelle v Gamble                   Johnson v Avery

Basic Unix Commands

Objective:
The objective of this lab is to work with files of UNIX file system.

Procedure:
1. OpenyourUnixshellandtrythesecommands:

Ø Create a new file and add some text in it vcat > filename

• Ø View a file
  vcat /etc/passwd vmore /etc/passwd vmore filename

• Ø Copy file, making file2 vcp file1 file2

• Ø Move/rename file1 as file2 vmv file1 file2

• Ø Delete file1 as file2 vrm file

//Deletefile //Double-checkfirst

vrm -i file
Ø Counts the lines, words, characters in file

vwc file
Ø Search file for a string

v Grep lubuntu /etc/passwd v grep 'else' /etc/profile
v grep ^united ~/myFile

// List lines containing ‘lubuntu’ in /etc/passwd

//Lines containing ‘else‘ in /etc/profile

//Lines starting with ‘united’ in ~/myFile

1

• Ø Output can be redirected to a file with’>’ vls > dir.txt
  vcal 1997 > year1997

• Ø Output can be appended to a file with ’>>’ vcal 1997 > years
  vcal 1998 >> years

• Ø Concatenate two files vcat f1 f2 > fs

• Ø Input redirection (less common) uses ‘<‘ vwc < years

• Ø Combine input and output redirection vwc < years > year-counts

  *Do screenshot of each steps you have completed* ((using lubuntu))

The program (​ stack-ptr.c​ ) implements stack using a linked list, however, it contains a race condition and is not appropriate for a concurrent environment. Using Pthreads mutex locks, fix the race condition. For reference, see Section 7.3.1 of SGG book.(Section 7.3.1 is about mutex and semaphores it does explain how to implement I'm just having a hard time finding the race condition within the code)

/*
* Stack containing race conditions
*/

#include
#include
#include

typedef int value_t;

// Node structure
typedef struct Node
{
value_t data;
struct Node *next;
} StackNode;

// function prototypes
void push(value_t v, StackNode **top, pthread_mutex_t *mutex);
value_t pop(StackNode **top, pthread_mutex_t *mutex);
int is_empty(StackNode *top);

void push(value_t v, StackNode **top, pthread_mutex_t *mutex)
{
StackNode *new_node;
new_node = (StackNode *)malloc(sizeof(StackNode));
  
new_node->data = v;
  
// mutex lock and unlock code

  
}

value_t pop(StackNode **top, pthread_mutex_t *mutex)
{
   StackNode *temp;
  
   pthread_mutex_lock(mutex);
  
// mutex lock and unlock code based on empty or full stack
  
}

int is_empty(StackNode *top) {
if (top == NULL)
return 1;
else
return 0;
}

int main(void)
{
StackNode *top = NULL;

// pthread_mutex variable declarion and verify push/pop operation for 4 inputs (5, 10, 15, 20)

  
   return 0;
}

It is a simple discussion please dont copy from any website, Ii need to be at least 3 paragraph. thanks

Discussion "The Women's Kingdom"

Please watch "The Women's Kingdom" which is a video about a matrilineal group in China and this video will give you an insight into a very different marriage pattern that most students are familiar with. After you have watched the video, research and post on a marriage pattern of a particular culture that is different from your own culture's or the Mosuo culture and describe that marriage pattern. Include the location (where they live and also the name of the peoples), what type of marriage pattern they practice and all other relevant information on the particular culture as it relates to marriage. THANKS

VIDEO LINK ============>>>>>    https://www.youtube.com/watch?v=bbzG0n3shTM

Indicate which test (dependent samples t-test, independent samples t-test, independent samples z-test) is most appropriate for the following situation:

i. Comparison of mean recycling participation between 9 large cities and 11 small cities

ii. Comparison of the weights of 16 Toronto Maple Leaf rookies at the beginning versus the end of the regular NHL season.

iii. Comparison of fin length of 35 male and 37 female brook trout sampled in Spruce Lake, Nottingham Forest.

iv. Comparison of the mass of 100 grain fed calves versus 100 grazing calves.

v. Comparison of body weights of 16 male and 23 female students from Grade 9 classes at a high school.

All vectors are in R^ n. Prove the following statements.

a) v·v=||v||2

b) If ||u||2 + ||v||2 = ||u + v||2, then u and v are orthogonal.

c) (Schwarz inequality) |v · w| ≤ ||v||||w||.

A transformer contains four times as many turns in the secondary coil as it does in the primary coil. If the input voltage is 4000 V, what is the output voltage?

1000 V

2000 V

4000 V

8000 V

16000 V

At the Santa Barbara fishing hole, people come from all around to catch fish to sell at the fish market.
The total number of fish caught is F = 10x-x²
where x is the number of fishermen. Suppose it costs
each person $20 a day to fish and that fish sell for $10 each at the market. At the social optimum,
how much would it hurt all the other fishermen (combined) if one more person started fishing?
(a) $30
(b) $20
(c) $10
(d) $40

Answer D=40

could you please explain in detail?

In a total-immersion measurement of a Santa’s density, he is found to have a mass of 122 kg in air and an apparent mass of 0.1875 kg when completely submerged with lungs almost totally empty.

What mass, in kilograms, of water does Santa displace?

What is Santa’s volume, in cubic meters?

Calculate Santa’s average density, in kilograms per cubic meter

If Santa’s lung capacity is 2.75 L, is he able to float without treading water with his lungs filled with air? Assume the density of air is 1.29 kg/m3