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Llana [10]
2 years ago
7

An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 220 engines

and the mean pressure was 5.4 pounds/square inch (psi). Assume the population standard deviation is 0.6. If the valve was designed to produce a mean pressure of 5.5 psi, is there sufficient evidence at the 0.05 level that the valve does not perform to the specifications? Step 5 of 6 : Identify the level of significance for the hypothesis test.
Mathematics
1 answer:
borishaifa [10]2 years ago
3 0

An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 220 engines and the mean pressure was 5.4 pounds/square inch (psi), the level of significance for the hypothesis test is 0.05. This is further explained below.

<h3>What is the level of significance?</h3>

Generally, the level of significance is simply defined as statistical analysis, the significance level is defined as the likelihood of rejecting the null hypothesis when it is correct.

In conclusion,  The average pressure throughout testing on 220 engines was 5.4 psi, and the significance threshold for the hypothesis test was set at 0.05.

Read more about  probability

brainly.com/question/795909

#SPJ1

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Uma barraca de tiro ao alvo de um parque de diversão dará um prêmio de r$ 20ao participante cada vez que ele acertar o alvo por
zavuch27 [327]

Resposta: 30

Explicação passo a passo:

Dado o seguinte:

Preço para atingir a meta = $ 20

Penalidade por falta de alvo = $ 10

Se 80 tiros forem disparados e os participantes receberem $ 100.

Número de vezes que o participante atinge o alvo.

Deixe o número de erros = m

Deixe o número de acertos = h

h + m = 80 - - - - (1)

20h - 10m = 100 - - - (2)

h = 80 - m

Substitua h = 80 - m em (2)

20 (80 - m) - 10m = 100

1600 - 20m - 10m = 100

-30m = 100 - 1600

-30m = - 1500

m = 50

De (h = 80 - m)

h = 80 - 50

h = 30

Número de acertos = 30

O participante acerta o alvo 30 vezes

4 0
3 years ago
All of the coats in a clothing store were on sale for 30% off the original price. Carlotta paid $41.30 for a coat after the disc
Yakvenalex [24]
(original price) -0.30*(original price) = $41.30
(original price)*0.7 = $41.30
(original price) = $41.30/0.70 = $59.00

The coat's original price was $59.00.
6 0
3 years ago
A community swimming pool is in the shape of a rhombus. Which statements must also describe the pool? Check all
Studentka2010 [4]

Answer: A. it is a Parallelogram and C. It is a quadrilateral.

Step-by-step explanation:

Those are the answers

6 0
3 years ago
Read 2 more answers
BRAINLEST! please help
Ede4ka [16]

Option D: A(n) = a + (n – 1) d

Solution:

To identify the formula for finding the nth term of an arithmetic sequence.

Let a be the first term.

d be the common difference of the each term.

n be the term of the number.

A(n) be the nth term of the arithmetic sequence.

Arithmetic formula:

A(n) = a + (n – 1) d

Example: 1, 4, 7, 10, 13, 16, 19, ...

This is a arithmetic sequence.

a = 1, d = 4 – 1 = 3.

To find the 5th term:

Substitute this in the above formula, we get

A(n) = a + (n – 1) d

A(5) = 1 + (5 – 1) 3

       = 1 + 4(3)

       = 1 + 12

A(5) = 13

In the given sequence 5th term is 13.

Hence Option D is the correct answer.

A(n) = a + (n – 1) d

8 0
3 years ago
the graph of f (x)=x^2 was translated 4.5 units to the left to create the graph of function g which function represent g?
mafiozo [28]

If the function is translated 4.5 units to the left to createe the graph of function g(x), hence the resuting function will be g(x) = (x + 4.5)^2

<h3>Translation of coordinates</h3>

Given the function expressed as
f(x) = x^2

If the function is translated 4.5 units to the left to createe the graph of function g(x), hence the resuting function will be:

g(x) = (x + 4.5)^2

Note that translation to the left means addition of the factor

Learn more on translation here: brainly.com/question/1046778

7 0
3 years ago
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