Answer:
D. A random sample
Step-by-step explanation:
The answer to your question is D. A random sample because this sampling type is people being randomly selected from the population. We can also rule out the other options because of the following reasoning:
[✗] A. A convenience sample
-> This is a good contender, but as she is not asking everyone and the sample is <em>for</em> the school, it would not make sense to ask people near her house for example, we can say that this probably is not the best option.
[✗] B. A self-selected sample
-> This type is more like a poll, people volunteer for a self-selected sample, while here they are being asked
[✗] C. A systematic sample
-> Every so often she is asking students questions, she does not have a set number of how often or of the population (that we know of)
[✓] D. A random sample
-> This option is correct as stated above. She is randomly picking people.
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
Answer:
Step-by-step explanation:
first of all arrange this data from ascending to descending order.
11,15,15,15,16,17,18,19,20,22,23
use formula
N+1/4 (N means no of observations)
11+1/4
12/4
3 rd term
therefore Q1=15
Answer:
Step-by-step explanation:
- Mother's age = m
- Son's age = s
<u>3 years later:</u>
- m + 3 = 4(s + 3) ⇒ m = 4s + 12 - 3 = 4s + 9
<u>3 years ago:</u>
- m - 3 = 2(s + 8) ⇒ m = 2s + 18 + 3 = 2s + 21
<u>Solve for s by substitution:</u>
- 4s + 9 = 2s + 21
- 2s = 12
- s = 6
<u>Find the value of m:</u>
Mother is 33 and son is 6
Answer: 2:1 B is the answer I think this is correct.
Step-by-step explanation:
Answer:
(x - 6)(x - 7)
Step-by-step explanation:
x² - 13x + 42
(x - 6)( x -7)
x = 6,7
Tell me if I am wrong.
If I am right, can I have brainliest?