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KonstantinChe [14]
3 years ago
14

A school teacher wants to survey students at her elementary school. She surveys 20 students from each grade level. What type of

sampling technique she is using
Mathematics
1 answer:
Elan Coil [88]3 years ago
4 0

Answer:

Stratified Random sampling

Step-by-step explanation:

When a random observations are selected from a number of individual groups in a particular population, the type of sampling technique is called Stratified Random sampling. Stratified Random sampling begins with the partitioning or splitting or a population into subgroups. A number of random selection are then made from each of the subgroups to form a collection of larger samples. This is different from the simple random sampling technique which makes random selection directly from a larger sample or population without prior partitioning of the population. The different grades of students represents the individual stratum from which random selections are made.

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What is the solution set of {x | x < 2} {x | x ≥ 2}? all numbers less than -5 and greater than 5 the empty set the numbers be
juin [17]

Answer:

The solution set is the empty set.

Step-by-step explanation:

{x | x < 2} is the set of all numbers less than 2. This means x can take values such as 1.99, 0, -2000 and so on. That is, all values less than 2.

{x | x ≥ 2} is the set of all numbers equal to or greater than 2. This means x can take values such as 2, 2.1, 5000, and so on. That is, 2 or any value greater than 2.

Since there is no sign between the two sets, the question is asking for the intersection between these two sets. That is, what elements are common to these two sets? As we can see, the two sets don't have any common element. Hence, their intersection is the empty set.

(Note that the union of these two sets would be the set of all real numbers as that includes all elements from either set).

3 0
3 years ago
Christian is going to invest $310 and leave it in an account for 20 years. Assuming the interest is compounded daily, what inter
S_A_V [24]

Answer:

r=5.86%

Step-by-step explanation:

6 0
3 years ago
Fraction from least to greatest 1/5 2/3 5/8
weqwewe [10]
1/5, 5/8, 2/3 

This is the order least to greatest
5 0
3 years ago
Read 2 more answers
Ms. Walker's class set up an online fund with a goal to raise $1,280 to go on a field trip. Ms. Walker starts the fund by deposi
madreJ [45]
What you can use for this case is a function of the potential type.
 We have then
 y = a (b) ^ x
 Where we have:
 Walker starts the fund by depositing $ 5
 a = 5
 Each week the balance of the fund is twice the balance of the previous week:
 b = 2
 The function is:
 y = 5 (2) ^ x
 The number of weeks to reach $ 1280 is 8 weeks.
 Check:
 y = 5 (2) ^ 8
 y = 1280
 Answer:
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 y = 5 (2) ^ x
 The number of weeks that it takes to reach the class goal is
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4 0
3 years ago
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Caleb drives for 3.5 hours at 65 miles per hour. How far does he travel? do not round your answer
Allushta [10]

Answer:

227.5

Step-by-step explanation: You have to multiply 3.5 times 65

Hope this helps!!!

6 0
3 years ago
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