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
kompoz [17]
3 years ago
12

Congress regulates corporate fuel economy and sets an annual gas mileage for cars. A company with a large fleet of cars hopes to

meet the 2011 goal of 30.2 mpg or better for their fleet of cars. To see if the goal is being met, they check the gasoline usage for 50 company trips chosen at random, finding a mean of 32.12 mpg and a standard deviation of 4.83 mpg. Is this strong evidence that they have attained their fuel economy goal
Mathematics
1 answer:
3241004551 [841]3 years ago
4 0

Answer:

There is sufficient evidence that fuel economy goal has been attained.

Step-by-step explanation:

The hypothesis :

H0 : μ < 30.2

H1 : μ ≥ 30.2

The test statistic :

(xbar - μ) ÷ (s/√(n))

xbar = 32.12 ; s = 4.83 ; n = 50

Test statistic :

(32.12 - 30.2) ÷ (4.83/√(50))

1.92 ÷ 0.6830651

T = 2.811

Using the Pvalue from test statistic calculator :

Since we used the sample standard deviation, we use the T distribution

df = n - 1 = 50 - 1 = 49

Pvalue(2.811, 49) ; one tailed = 0.00354

At α = 0.05

Pvalue < α ; then we reject the null and conclude that there is sufficient evidence that fuel economy goal has been attained

You might be interested in
The perimeter of a shape shows a car racing track, how far does a car travel in a race which consists of 23 laps 1.2km , 1.2 km
inna [77]

Answer:

110.4km

Step-by-step explanation:

1 lap is equal to 4.8

4.8×23=110. 4

(Need someone to confirm)

6 0
3 years ago
Which number is irrational?<br><br> A. 1.752752...<br> B. /16/4<br> c. /12<br> D. 1.3
Anton [14]
I think it would be A
3 0
3 years ago
Read 2 more answers
I have trouble with these two questions, even i did my equation but i don’t get the answers
Sophie [7]

Answer:

$318.17, out of state college is $161.12 cheaper per month

Step-by-step explanation:

72*24 = 1728 + 410*4 = 1728 + 1640 = 3368 + 450 = 18/12 = $318.17

8700+650*9 = 8700 + 5850 = 14550/9 = 1616.66

8500+400*9 = 8500 + 3600 = 12100 + 1000 = 13100/9 = 1455.56

1616.67 - 1455.56= $161.11 (use $161.12)

3 0
3 years ago
Solve for x. have to turn in by tomorrow !
Elanso [62]
To solve this problem you must apply a theorem called: Intersecting secant theorem. The proccedure is shown below:

 1) For the figure shown on the left:

 (5)(x+5)=(6)(4+6)
 5x+25=60
 5x=60-25
 x=35/5
 x=7

 
2) For the figure shown on the right:

 (3)(3+5)=(4)(x+4)
 24=4x+16
 24-16=4x
 8=4x
 8/4=x
 x=2
7 0
3 years ago
What percent of 250 is 2
Dafna11 [192]

Answer:

2.5

Step-by-step explanation:

math is easy to get off the game and then go back in school

8 0
3 years ago
Read 2 more answers
Other questions:
  • 24x-12x^2=0 What is the result of this(please step by step)
    11·1 answer
  • Graph the exponential function.<br> f(x)= -(5/2)^x
    14·1 answer
  • Which number is located to the right of -1 2/3 on the horizontal number line?
    7·1 answer
  • Olivia ordered 24 cupcakes and a layer cake costs 16$ and the total cost of the order was 52$ what was the price of each cupcake
    10·1 answer
  • What point satisfies y&lt;=x^2-5x+6<br> a (4,4)<br> b (2,2)<br> c (3,3)<br> d (1,1)
    13·1 answer
  • I need help ASAP, WORTH 25 POINTS PLEASE HELP <br> SEE PICTURE FOR PROBLEM
    13·1 answer
  • The graph of y =f(x) is shown below. Find all values of x where f (x)=0 (check photo)
    6·1 answer
  • Solve the inequality. Graph and check your solutions.
    14·1 answer
  • Help please I'ma giving alot of points if you say something else just to get the points I will report ​
    6·1 answer
  • 12. For which of the following quadratic equations are the roots 2 and 57
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!