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
AfilCa [17]
2 years ago
10

The management of a large airline wants to estimate the average time after takeoff taken before the crew begins serving snacks a

nd beverages on their flights. Assuming that management has easy access to all of the information that would be required to select flights by each proposed method, which of the following would be reasonable methods of stratified sampling?
a. For each day of the week, randomly select 5% of all flights that depart on that day of the week.
b. Divide all flights into the following 4 groups on the basis of scheduled departure time: before 9:00 am 9:00 am to 1:00 pm. 1:00 pm to 5:00 pm, and after 5:00 pm. Randomly select 5% of the flights in each group.
c. For each crew member the airline employs, randomly select 5 flights that the crew member works.
d. Divide the airports from which the airline's fights depart into 4 regions: Northeast, Northwest Southwest and Southeast. Randomly select 5% of all flights departing from airports in each region
Mathematics
1 answer:
Dahasolnce [82]2 years ago
3 0

Answer:

The answer is "Option a, Option b, and Option d".

Step-by-step explanation:

In the given question it is used to stratifying the sampling if the population of this scenario it flights takes off when it is divided via some strata.

  • In option a, In this case, it stratified the sampling, as the population of planes taking off has been divided into the days of the week.
  • In option b, It also used as the case of stratified sampling.
  • In options c, it is systematic sampling, that's why it is wrong.
  • In option d,  It is an example of stratifying the sampling.
You might be interested in
Which two points have an undefined slope?
Galina-37 [17]

Answer:is there a pic

Step-by-step explanation:

More info?

8 0
2 years ago
Point P(-5,2) is translated using the rule (x + 3, y - 1) What is the x - coordinate of P'​
Brums [2.3K]

Answer:

-2

Step-by-step explanation:

Since we are adding 3 to the x-coordinate and subtracting 1 from the y-coordinate, (-5, 2) becomes (-2, 1).

4 0
3 years ago
Read 2 more answers
Two airplanes leave an airport at the same time, the first headed due north and the second at a bearing of N42^ E . At 2:00PM, t
Leno4ka [110]

Answer:

The two airplanes are about 330miles apart.

Step-by-step explanation:

The diagram interpreting the question has been attached to this response.

As shown in the diagram,

i. the airplanes leave at point C.

ii. at 2.00pm the first and second airplanes are at points A and B respectively, where they are 312miles and 487miles away from the starting point C in directions due north and N42E from the point C.

iii. the points A, B and C form a triangle with sides a, b and c.

To solve for the value of c which is the distance between the two planes at 2.00pm, the cosine rule is used.

c² = a² + b² - 2abcosC            --------------(i)

where;

b  = 312miles

a = 487miles

C = 42°

Substitute these values into equation (i) and solve as follows;

c² = (487)² + (312)² - 2(312)(487)cos(42)

c² = (237169) + (97344) - 303888cos(42)

c² = (237169) + (97344) - 303888(0.7431)

c² = 334513 - 225819.1728

c² = 108693.8272

<em>Take the square root of both sides</em>

√c² = √108693.8272

c = 329.69

c ≅ 330miles

Therefore, the two airplanes are far apart by 330miles

3 0
3 years ago
Given that the following statement is true
Makovka662 [10]

Answer:

C IS THE ANS COS ALL POLYGONS ARE CLOSED AND IF IT NOT CLOSED IT NOT A POLYGON

5 0
2 years ago
How many times larger is the area of Rectangle 2 than the area of Rectangle 1?
aivan3 [116]

Answer:

I would need to see the rectangles and there areas to answer that sorry

8 0
3 years ago
Other questions:
  • What are linear simultaneous equations?
    8·1 answer
  • Bob can type 2 letters in 4 hours while Bill can do it in 6 hours. How many hours would it take them to type six letters togethe
    8·2 answers
  • This graph shows a proportional relationship between the number of tulips and the number of daffodils in gardens planned by the
    5·2 answers
  • PICKING BRAINLIEST ANSWER!!!!!!!!!!  Which graph shows a dilation?
    12·2 answers
  • Write an equation of the parabola in vertex form that passes through (0, -24) and has vertex (-6,-12)
    15·1 answer
  • PLD HELP ME I WILL FAIL PLS​
    8·1 answer
  • Don’t get mad just don’t feel like doing this.A car travels 205 miles in 5 hours.calculate the average speed the car was traveli
    9·2 answers
  • Graph the line with the equation y = -x + 7.
    11·1 answer
  • Round 3 72/120 to the nearest whole
    6·1 answer
  • 100 points and i will mark brainiest. <br> What is 131072 divided by 2 to the power of 4
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!