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
aev [14]
3 years ago
12

Twenty motors were put on test under a high-temperature setting. The lifetimes in hours of the motors under these conditions are

given below. Suppose we assume that the lifetime of a randomly selected motor under these conditions, X, has a Gamma (1, theta) distribution.
(a) Derive the maximum likelihood estimate of 9 and evaluate it numerically.
(b) Obtain the sample median of the data, which is an estimate of the median lifetime of a motor. What parameter is it estimating (i.e., determine the median of X)?
(c) Based on the mle, what is another estimate of the median of X?
(d) Obtain a large sample approximate 95% confidence interval for the mean lifetime of a motor.

Mathematics
1 answer:
natta225 [31]3 years ago
3 0

Answer:

Step-by-step explanation:

The step by step explanation is given in the attached document.

You might be interested in
How do u solve this pls help
Leni [432]

Answer is in the picture.

4 0
2 years ago
The table shows the distance in feet, y, that a rocket traveled in x seconds.
Murrr4er [49]

Answer:

The correct option is D. y = 25x^{2}.

Step-by-step explanation:

i) From the table and our own observation and a trial and error approach we

  can clearly see that the equation that matches y in feet ( the distance

  traveled by the rocket) and x in seconds ( the time elapsed) is given by the

  equation y = 25x^{2}

 Therefore the correct option is D. y = 25x^{2}.

7 0
3 years ago
Read 2 more answers
A coach purchases 47 hats for his players and their families at a total cost of $302. The cost of a small hat is $5.50. A medium
frosja888 [35]

Answer:

The answer is below

Step-by-step explanation:

Let x represent the number of small hat purchased, y represent the number of medium hat purchased and z represent the number of large hat purchased.

Since a total of 47 hats where purchased,  hence:

x + y + z = 47    (1)

Also, he spent a total of $302, hence:

5.5x + 6y + 7z = 302     (2)

He purchases three times as many medium hats as small hats, hence:

y = 3x

-x + 3y = 0    (3)

Represent equations 1, 2 and 3 in matrix form gives:

\left[\begin{array}{ccc}1&1&1\\5.5&6&7\\-3&1&0\end{array}\right] \left[\begin{array}{c}x\\y\\z\end{array}\right] = \left[\begin{array}{c}47\\302\\0\end{array}\right] \\\\\\\\ \left[\begin{array}{c}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}1&1&1\\5.5&6&7\\-3&1&0\end{array}\right] ^{-1} \left[\begin{array}{c}47\\302\\0\end{array}\right] \\\\\\ \left[\begin{array}{c}x\\y\\z\end{array}\right] = \left[\begin{array}{c}6\\18\\23\end{array}\right]

Therefore he purchases 6 small hats, 18 medium hats and 23 large hats

5 0
3 years ago
a basketball court is a rectangle that is 94 feet long the area is 4700 square feet what is the width of the basketball court
andre [41]

Answer:

A=l x w 4700=94x? 4799/94~jz

7 0
2 years ago
Graph the function. Find the y-intercept and state the domain and range. Y = 3(2^x) - 4
Thepotemich [5.8K]

Answer:

the first one

Step-by-step explanation:

4 0
2 years ago
Other questions:
  • The perimeter of a geometric figure is the sum of the lengths of its sides. If the perimeter of the pentagon to the right (five-
    14·1 answer
  • Plz help no guessing
    5·2 answers
  • 1/2(10x+20y+10z help me please
    14·2 answers
  • How to tell if object transformation is parallel or not parallel
    15·1 answer
  • (3x -1) + (2x+1) (x)
    14·1 answer
  • How do I know if it is parallel or perpendicular?
    5·1 answer
  • How many edges does a 3D pentagon have
    14·1 answer
  • What is 55/100 in the simplest form?
    9·1 answer
  • A recipe that makes 10 raspberry muffins calls for / teaspoons of baking powder. How much baking powder is needed to make 3 doze
    12·2 answers
  • I'm giving away some points​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!