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maxonik [38]
1 year ago
8

Oh need to know alot and a lot

Mathematics
1 answer:
o-na [289]1 year ago
5 0

Answer:

yeah so it is 74882828 it is pretty easy

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Population A and Population B both have a mean height of 70.0 inches with an SD of 6.0. A random sample of 50 people is picked f
Alex

Answer:

Sample mean from population A has probably more accurate estimate of its population mean than the sample mean from population B.

Step-by-step explanation:

To yield a more accurate estimate of the population mean, margin of error should be minimized.

margin of error (ME) of the mean can be calculated using the formula

ME=\frac{z*s}{\sqrt{N} } where

  • z is the corresponding statistic in the given confidence level(z-score or t-score)
  • s is the standard deviation of the sample (or of the population if it is known)
  • N is the sample size

for a given confidence level, and the same standard deviation, as the sample size increases, margin of error decreases.

Thus, random sample of 50 people from population A, has smaller margin of error than the sample of 20 people from population B.

Therefore, sample mean from population A has probably more accurate estimate of its population mean than the sample mean from population B.

7 0
3 years ago
Which equation represents a line which is parallel to the line 2x+y=-82x+y=−8?
geniusboy [140]

Answer:

x=7 is the line parallel to the given line x=8 . Parallel lines are the lines which are always same distance apart and never intersect. The given line is x=8 with intersects the x axis at x=8 and it is parallel to y axis with slope infinite or not defined.

Step-by-step explanation:

6 0
2 years ago
Difference between x+5 and 2x+3
solniwko [45]
-x+8
I wrote out the problem above to my best knowledge

7 0
2 years ago
How many terms will the following expression have once it is simplified?
MA_775_DIABLO [31]

Answer:

B


Step-by-step explanation:

<em>Let's multiply this out and combine like terms:</em>

3x(x+1)+x\\=3x^2+3x+x\\=3x^2+4x


So there are 2 terms.

Answer choice B is right.

5 0
3 years ago
Read 2 more answers
What is this expression?
Liula [17]

Answer:

2) 4/3

Step-by-step explanation:

(4^-3 * 3^4 * 4^2)/(3^5 * 4^-2)

4^-3 * 3^4 * 4^2 = 4^-1 * 3^4

(4^-1 * 3^4)/(4^-2 * 3^5)

(3^4)/(3^5) = 1/(3^5-4)

(4^(-1))/(4^-2 * 3^(5-4)

(4^-1)/(4^-2 * 3)

4^(-1 - (-2)) / (3)

-1 - (-2) = 1

4/3

4 0
3 years ago
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