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
Tom [10]
3 years ago
7

An automobile manufacturer claims that its van has a 44.3 miles/gallon (MPG) rating. An independent testing firm has been contra

cted to test the MPG for this van since it is believed that the van has an incorrect manufacturer's MPG rating. After testing 130 vans, they found a mean MPG of 44.4. Assume the standard deviation is known to be 2.6. A level of significance of 0.05 will be used.
(a) Make a decision to reject or fail to reject the null hypothesis.
Mathematics
1 answer:
natulia [17]3 years ago
7 0

Step-by-step explanation:

H0: u = 44.3

Hi : u# 44.3

Z1-0.05/2

Z1-0.025

Z0.975 = 1.96

Z = x-u/s.d/√n

Z= 44.4 -44.3/2.6/√130

Z = (0.1×11.4018)/2.6

Z=0.44

Since the calcalculated value is less than the table value and does not fall in the rejection region we fail to reject the null hypothesis

You might be interested in
Factor the expression.<br> = 28x– 14
Veseljchak [2.6K]

Answer:

14(2×-1) is the factorization of this expression

5 0
2 years ago
Diane has $1.85 in dimes and nickels. She has a total of 24 coins. How many of each kind does she have?
poizon [28]
<span>Let the nickels be x and the dimes be y
 x + y = 24
 5x + 10y = 185
 5x + 5y = 120
 5y = 65
 y=13
 x=11
 Answer: 11 nickels and 5 dimes</span>
3 0
3 years ago
The area of rectangular is 64m the length of the pool is 12 m less that the width .The situation can be represented by the equat
beks73 [17]

Answer:

Width = 16 m

Length = 4 m

Step-by-step explanation:

The area of rectangular is 64m² the length of the pool is 12 m less that the width . The situation can be represented by the equation x

Area of a rectangle = Length × Width

L = W - 12

Hence:

64 = (W - 12) × W

64 = W² - 12W

W² - 12W - 64 = 0

Factor using

(W + 4)(W - 16) = 0

Width = 16m

Length = W - 12

Length = 16 m - 12 m

= 4 m

6 0
2 years ago
18. cos t(sec t - cos t)
Margarita [4]
\bf sin^2(\theta)+cos^2(\theta)=1\implies sin^2(\theta)=1-cos^2(\theta)\\\\&#10;sec(\theta)=\cfrac{1}{cos(\theta)}&#10;\\\\&#10;-----------------------------\\\\&#10;cos(t)[sec(t)-cos(t)]\implies cos(t)sec(t)-cos(t)cos(t)&#10;\\\\\\&#10;cos(t)\cdot \cfrac{1}{cos(t)}-cos^2(t)\implies 1-cos^2(t)\implies \boxed{sin^2(t)}
8 0
3 years ago
on October 17, 2006 in an article called US Population Reaches 300 million, the BBC reported that the US gains 1 person every 11
docker41 [41]
<span>The area of an n-sided regular polygon approaches the area of a circle as n gets very large. ... If an N-gon (polygon with N sides) has perimeter P, then each of the N ... and we can use one of them to derive theequation sin(theta/2) ... 2*pi/N radians), R is the length of the lines to the center (the radius of the ...</span><span>
</span>
6 0
2 years ago
Other questions:
  • Is the equation below an example of growth or decay y=4x
    10·2 answers
  • Kendall is buying a home for 119,000 she is making a 12% down payment and financing the rest with 20-year loan at 4.5% interest
    6·1 answer
  • A large container has a maximum capacity of 64 ounces. The container is filled with 8 ounces less than its maximum capacity.
    15·1 answer
  • Is my answer correct?
    5·1 answer
  • 18 - (-f) = 91 (With work please)
    13·2 answers
  • Kelvin ordered four pizzas for a birthday party. The pizzas were cut into eighths. How many slices were there? (Draw a picture t
    8·2 answers
  • In a long-jump competition, Connor jumped 160 centimetres.
    11·1 answer
  • The length of a rectangle is represented by 9x - 5. The width of the rectangle is represented by 3.
    9·1 answer
  • (WILL MARK BRAINLIEST) Keisha is playing a game using a wheel divided into 8 equal sectors, as shown in the diagram below. Each
    12·1 answer
  • Please answer both questions right answers get ✨brainlest!✨
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!