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Nookie1986 [14]
2 years ago
8

Consider this population data set:4, 6, 7, 11, 12, 18, 26, 23, 14, 31, 22, and 12. The values 11, 31, 22, and 12 constitute a ra

ndom sample drawn
from the data set.
The sample mean is more than the population mean by
Reset
Next
Mathematics
1 answer:
irga5000 [103]2 years ago
3 0

Answer:

3.5

Step-by-step explanation:

Find the Mean of the Population Data Set

4 + 6 + 7 + 11 + 12 + 18 + 26 + 23 + 14 + 31 + 22 + 12 = 186

186 ÷ 12 = 15.5

Find the Mean of the Sample Data Set

11 + 31 + 22 + 12 = 76

76 ÷ 4 = 19

Subtract

19 - 15.5 = 3.5

Answer: <em>The sample mean is more than the population mean by 3.5</em>

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Write the perimeter of the triangle as a simplified polynomial. Then factor the polynomial
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Answer:

c

Step-by-step explanation:

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2 years ago
David is saving $250 to buy a bicycle. He saved $8 each week for 12 weeks. He wants to buy the bicycle in 7 more weeks. How much
Colt1911 [192]

Answer:

22

Step-by-step explanation:

Amount saved = $8 x 12 weeks

= $96

Amount to save = $250- $96

= $154

Amount per week= 154/7

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5 0
3 years ago
You successfully completed statistics, and the Math Department Chair recruited you to be a tutor. It’s day one on the job, and y
zvonat [6]

Answer:

Step-by-step explanation:

Ok, so we have to help your pupil (lets call her Jane) figure out "why researchers should use a random sample to conduct a survey". So, i will list all of the choices.

  • A random sample is likely to avoid bias
  • In a random sample some members of the population are more likely to be selected than others
  • Random samples provide consistency and systematically favor one choice over every other choice in each survey question
  • Random sampling will provide a more representative sample of population
  • Researchers can use a random sample to draw conclusions about the population

Random sampling is used to get the best average, and not favor any one opinion. For example, if you were trying to figure out the daily spending budget of people, you wouldn't just go to the upper clas part with all the rich people, you would survey from all over the town to get results from all kinds of people. So, the answers are:

  • A random sample is likely to avoid bias (because thats exactly what they do)
  • Random sampling will provide a more representative sample of population (because they are designed to do that)
  • Researchers can use a random sample to draw conclusions about the population (thats why they take the samples)

Hope this helps

4 0
3 years ago
Are the dotted lines in the shape parallel, perpendicular or intersecting?
slava [35]

Answer:

<em>Parallel</em>

Step-by-step explanation:

The dotted lines are parallel because they have the same <u>gradient</u> to each other, this means the two dotted lines will <u>never</u> touch each other.

Have a great day <3

8 0
3 years ago
On Sunday, a local hamburger shop sold a combined total of 414 hamburgers and cheeseburgers. The number of cheeseburgers sold wa
dsp73
414 divided by 2= 207
divided by 2 because two times the number
207 hamburgers sold
7 0
2 years ago
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