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Sati [7]
3 years ago
9

A sample of 49 observations is taken from a normal population with a standard deviation of 10. the sample mean is 55. determine

the 90% confidence interval for the population mean. (round your answers to 2 decimal places.)
Mathematics
1 answer:
olga2289 [7]3 years ago
8 0

Answer:

157394

Step-by-step explanation:

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vzgsvgststs

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Which measurement can be used to describe the size of an angle?
Mrac [35]

Answer:

  90 degrees

Step-by-step explanation:

grams is a unit of mass

degrees is a unit of angle measure

milliliters is a unit of volume

inches is a unit of length

6 0
3 years ago
Provide a formula that can be used to determine whether a point in a circle that is centered about (0,0) with a diameter of 12
fomenos

Answer:

x² + y² = 36

Step-by-step explanation:

The formula for the circle is

x² + y² = 36

If the point is on the circle it will equal 36 when plugged into the formula

Point(6, 0)

6² + 0 = 36

36 = 36    on the circle

point (5, 1)

5² + 1² = ?

25 + 1 = 26

26 ≠ 36      not on the circle

7 0
3 years ago
Read 2 more answers
Need help asap!!!!!!!!!
Simora [160]

Answer:

b

Step-by-step explanation:

its the only answer with consistent values that go up

4 0
3 years ago
Read 2 more answers
At the beginning of a​ walk, roberto and juanita are 7.77.7 miles apart. if they leave at the same time and walk in the same​ di
dem82 [27]
Roberto overtakes Juanita at the rate of (7.7 mi)/(11 h) = 0.7 mi/h. This is the difference in their speeds. The sum of their speeds is (7.7 mi)/1 h) = 7.7 mi/h.

Roberto walks at the rate (7.7 + 0.7)/2 = 4.2 mi/h.
Juanita walks at the rate 4.2 - 0.7 = 3.5 mi/h.


_____
In a "sum and diference" problem, one solution is half the total of the sum and difference. If we let R and J be the respective speeds of Roberto and Juanita, we have
  R + J = total speed
  R - J = difference speed
Adding these two equations, we have
  2R = (total speed + difference speed)
  R = (total speed + difference speed)2 . . . . . as computed above
4 0
4 years ago
What is the mean of -18, -14, 11, and 13?
Romashka-Z-Leto [24]
Hello User

To do this we need to first add all of the numbers together.

-18 + -14 + 11 + 13 = -8

The next step is to divide the result by how many pairs of numbers there are.
As you can see there are 4 pairs of numbers

So we divide -8 by 4 to get -2

Therefore -2 is the answer to this problem

I hope I helped :-)

-Chris 
6 0
4 years ago
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