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elixir [45]
3 years ago
10

nếu nhà nghiên cứu chọn đơn vị thứ k từ một tổng thể n đơn vị, điều này có ý nghĩa cô ấy đang sử dụng kỹ thuật chọn mẫu nào? Vì

sao?
Mathematics
1 answer:
stiv31 [10]3 years ago
4 0

Answer:

Simple random sampling

Step-by-step explanation:

Every element of the population does have an equal probability of getting chosen in a basic random sampling. The entire population should be included in your sample frame. To conduct this sort of sampling, technologies such as random numbers or other approaches relying completely on chance can be used.

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An item is regularly priced at $55. Michael bought it on sale for 80% off the regular price. How much did Michael pay
garri49 [273]

Answer:

he paid $11

Step-by-step explanation:

7 0
2 years ago
A town has a population of 1,000 people. The population triples every 100 years. Which equation and graph show the number of yea
photoshop1234 [79]
I believe you have to add the 1,000 and 100
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3 years ago
Amanda is going to rent a truck for one day. There are two companies she can choose from, and they have the following prices. Co
Tema [17]

Answer:

For mileages higher than 80 miles Company A  will charge less than Company B

Step-by-step explanation:

Hi, to answer this question we have to write an inequality:

Company A charges $111 and allows unlimited mileage.

Company A =111

Company B has an initial fee of $55 and charges an additional $0.70 for every mile driven

Company B = 55+0.70m

Where m is the number of miles.

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a<b

111 < 55+0.70m

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111-55 < 0.70 m

56 < 0.70m

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5 0
3 years ago
Find the length of each arc. Round to the nearest tenth.
avanturin [10]

Answer:

arc ≈ 5.5 units

Step-by-step explanation:

The arc of the circle is calculated as

arc = circumference of circle × fraction of circle

     = 2πr × \frac{\frac{\pi }{2} }{2\pi } ( r is the radius )

    = 2π × 3.5 × \frac{1}{4}

    = \frac{7\pi }{4}

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7 0
2 years ago
Please help 20 points!!
frutty [35]
Where is the question?
7 0
2 years ago
Read 2 more answers
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