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
vovangra [49]
3 years ago
7

Two suppliers manufacture a plastic gear used in a laser printer. The impact strength of these gears measured in foot-pounds is

an important characteristic. A random sample of 10 gears from supplier 1 results in $$\overline{\mbox{x}}_1=290$$ and $$s_1 = 12$$, and another random sample of 16 gears from the second supplier results in $$\overline{\mbox{x}}_2=321$$ and $$s_2 = 22$$.
a. Is there evidence to support the claim that supplier 2 provides gears with higher mean impact strength? Use α = 0.05, and assume that both populations are normally distributed but the variances are not equal.
What is the P-value for this test?
b. Do the data support the claim that the mean impact strength of gears from supplier 2 is at least 25 foot-pounds higher than that of supplier 1? Make the same assumptions as in part (a).
c. Construct a confidence interval estimate for the difference in mean impact strength, and explain how this interval could be used to answer the question posed regarding supplier-to-supplier differences.

Mathematics
1 answer:
solong [7]3 years ago
6 0

Step-by-step explanation:

The explanation and the graphical representation is attached

You might be interested in
Whats is a 3 step problem that can represent the expression 3x + (-5) = 19
GrogVix [38]

Answer:

x=8

Step-by-step explanation:

3x-5=19\\

The first step is to add -5 to both sides:

(3x-5)+5=19+5\\3x=24

The next step is to divide 3 on both sides:

\frac{3x}{3} =\frac{24}{3}

x=8

3 0
2 years ago
Can someone plz help me
GenaCL600 [577]

1. a) Find the y-intercept of the line, then you find the slope the line, and then you can write the equation in y-intercept form, which is y=mx+b, m is the slope and b the y-intercept.

y= x+70 is the equation

b) 70

c) 120

3 0
3 years ago
I need help with my math
Tresset [83]
What is the question 
3 0
3 years ago
You have 24 months left until you graduate and you plan on buying yourself a new $20,000 car on graduation day. If you invest $3
shusha [124]

Answer: No, the money won't be enough to buy the car

Step-by-step explanation:

you plan on buying yourself a new $20,000 car on graduation day and graduation day is 24 months time. If you invest $300 a month for the next 24 months.

The principal amount, p = 300

He is earning 4% a month, it means that it was compounded once in four months. This also means that it was compounded quarterly. So

n = 4

The rate at which the principal was compounded is 4%. So

r = 4/100 = 0.04

It was compounded for a total of 24 months. This is equivalent to 2 years. So

n = 2

The formula for compound interest is

A = P(1+r/n)^nt

A = total amount that would be compounded at the end of n years.

A = 300(1 + (0.04/4)/4)^4×2

A = 300(1 + 0.01)^8

A = 300(1.01)^8

A = $324.857

The total amount at the end of 24 months is below the cost of the car which is $20000. So he won't have enough money to buy the car

3 0
3 years ago
Is y=5x-25 proportional
Vinvika [58]
It is proportional because we increase y.
3 0
3 years ago
Other questions:
  • Choose the angle whose measure is greater than 90 degrees but less than 180 degrees.
    10·1 answer
  • In a machine,a large gear completes a revolution every minute while a small gear completes a revolution every 24 seconds.If the
    5·1 answer
  • Please help will mark brainliest.
    14·1 answer
  • The populations and areas of four states are shown. A 3-column table has 4 rows. The first column has entries State A, State B,
    12·1 answer
  • I have a hard time understanding this question​
    15·1 answer
  • A shipping container is in the shape of a right rectangular prism with a length of 7.5
    15·1 answer
  • Given quadrilateral QRST - quadrilateral HIJK, QR = 10, QT = 6, and HI = 8, find KH.
    7·2 answers
  • Tangent secant like what is the formula geo kids only 40 points and brainliest thanks
    7·1 answer
  • Steak cost $3.85 per pound if you buy a 3 pound steak and pay for it with a $20 bill how much change will you get ?
    10·2 answers
  • What is 3+6/2?<br><br> Whoever answers correct will get brainliest.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!