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hammer [34]
3 years ago
13

As we study random variables, the idea of z-scores will come up again. What is a z-score (in words) and what is the formula for

finding a z-score?
Mathematics
1 answer:
arsen [322]3 years ago
7 0
For a confidence interval with level C, the value p is equal to (1-C)/2. A 95% confidence interval for the standard normal distribution, then, is the interval (-1.96,1.96), since 95% of the area under the curve falls within this interval. <span>The point estimate for the </span>population proportion<span> is the sample proportion, and the margin of error is the product of the Z value for the desired confidence level (e.g., Z=1.96 for </span>95%<span> confidence) and the standard error of the point </span>
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mojhsa [17]
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7 0
3 years ago
75 miles to 225 miles as a fraction in simplest form
Pie

Answer:

\frac{1}{3}

Step-by-step explanation:

When reducing a number to its lowest term you use the GCF of the denominator and numerator then divide using this number. :

\frac{75}{225} ÷\frac{75}{75} = \frac{1}{3}

The gcf of 75 and 225 is 75 so we divide both the numerator and denominator by 75.

HOPE THIS HELPED

5 0
3 years ago
Finding the Slope: Identify the slope on the graph. I will give 10 brainlist if correct ​
lyudmila [28]

Answer:

slope = 1/2

Step-by-step explanation:

8 0
3 years ago
Can I get help with this please
drek231 [11]

Answer:

3)  1 5/6 mi

4)  a. 4 cm, 6 ft

    b. 6.4 cm, 9.6 ft

    c. same as part a

Step-by-step explanation:

3) Each of the given distances appears twice in the sum of side measures that is the perimeter. Hence by walking the perimeter twice, Kyle walks each of the given distances 4 times. His total walk is ...

  4×1/3 + 4×1/8 = 4/3 + 4/8

  = 1 1/3 + 1/2 = 1 2/6 + 3/6

  = 1 5/6 . . . . . miles

___

4) Since the figure is rectilinear (all angles are right angles, and all sides are straight lines), the sum of partial dimensions in one direction is equal to the whole dimension in that direction.

a. 8 cm = 4 cm + x

  8 cm - 4 cm = x = 4 cm

The distance in the room is ...

  (4 cm)×(1.5 ft/cm) = 6 ft

b. 10.3 cm = 3.9 cm + y

  10.3 cm - 3.9 cm = y = 6.4 cm

The distance in the room is ...

  (6.4 cm)×(1.5 ft/cm) = 9.6 ft

c. The answer to part b was obtained in the same way as the answer to part a.  The unknown dimension is the difference of given dimensions. The actual length in the room is the model length multiplied by the inverse of the scale factor.

3 0
3 years ago
Plz help me I've been stuck on this
timurjin [86]
I found this :) hope it helps

7 0
3 years ago
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