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lakkis [162]
2 years ago
9

1. Each student at a school has a student identification number. Counselors have a computer

Mathematics
1 answer:
KatRina [158]2 years ago
3 0

Answer:

Simple random sampling

Step-by-step explanation:

From the sampling description explained above, the sampling method used is a simple random sampling method whereby a small subset or group is chosen from a larger set or population with all individuals in the population having exactly equal chance. The entire sample during a simple random sampling does not have to partitioned or subdivided into groups or subgroups. All individual samples are entirely sampled together with all having the sample probability of being chosen. This way the samples are representative of the entire population. All students in the scenario were sampled with any subdivision. Hence, we have a simple random sampling method.

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In January of 2011, the U.S. saw an increase in gas prices. Imagine the average price per gallon was $3.12 with a standard devia
Arada [10]

Answer:

31.92%

Step-by-step explanation:

We are given;

Population mean; μ = $3.12

Sample mean; x¯ = $3.16

Sample size; n = 10

Standard deviation; σ = $0.27

Z-score formula is; z = (x¯ - μ)/(σ/√n)

z = (3.16 - 3.12)/(0.27/√10)

z = 0.04/(0.08538)

z ≈ 0.47

Now, the percent of other sample means, based on 10 gas stations, that would be greater than the one observed is;

P(x¯ > 3.12) = 1 - P(z < 0.47)

From z-table attached P(z < 0.47) = 0.68082

Thus;

P(z > 0.47) = 1 - 0.68082

P(z > 0.47) ≈ 0.3192

This expressed in percentage is 31.92%

4 0
2 years ago
(01.02 MC)Which of the following expressions shows how to rewrite 4 − 5 using the additive inverse and displays the expression c
n200080 [17]

Answer:

I think the answer is 1. The expression 4 plus negative 5 is written on top. A number line from negative 10 to positive 10 is shown, with numbers labeled at intervals of 1. An arrow is shown from point 0 to 4. Another arrow points from 4 to negative. So the answer is A

hope this helps sorry if it wrong

pls let me now if right or wrong

4 0
2 years ago
I need help with this question
Sedaia [141]

Answer:

3

Step-by-step explanation:

just do (-1/2) x (-6) where the negatives cancels out and half of 6 is 3

Brainilist Maybe?

3 0
2 years ago
Read 2 more answers
A computer rounded the number 129. 257 to the nearest hundredth what is this number rounded to the nearest hundredth
Ipatiy [6.2K]

129.26 because 7 is over 5

6 0
3 years ago
Express the ratio in its simpilest form<br><br> 4:2:2
kotykmax [81]
The ratio in simplest form would be 1:2:2.
5 0
2 years ago
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