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nevsk [136]
3 years ago
11

A sample of 56 research cotton samples resulted in a sample average percentage elongation of 8.17 and a sample standard deviatio

n of 1.42 ("An Apparent Relation Between the Spiral Angle f, the Percent Elongation E1, and the Dimensions of the Cotton Fiber," Textile Research J., 1978: 407- 410). Calculate a 95% large-sample CI for the true average percentage elongation ?. What assumptions are you making about the distribution of percentage elongation?
Mathematics
1 answer:
Step2247 [10]3 years ago
4 0

Answer:

(7.7981, 8.5419). The distribution of percentage elongation can be any distribution with finite mean and variance.

Step-by-step explanation:

We have a large sample size n = 56 research cotton samples. Besides, \bar{x} = 8.17 and s = 1.42. A 95% large-sample CI for the true average percentage elongation is given by \bar{x}\pm z_{0.05/2}(s/\sqrt{n}), i.e., 8.17\pm (1.96)(1.42/\sqrt{56}) or equivalently (7.7981, 8.5419). The distribution of percentage elongation can be any distribution with finite mean and variance because we have a large sample.

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50/100 in tenth fraction and decimal form
Flura [38]

Answer:

5/10 and .5

Step-by-step explanation:

50/100 is 1/2 so 1/2 is equal to 5/10

5/10 is also 1/2 and 1/2 as a decimal is .5 or 0.5

hope it helps !

7 0
2 years ago
There are 614,952 pepole living in a city round this number ot the nearest thousand
Dima020 [189]

Answer:

615,000

Step-by-step explanation:

When you "round to the nearest _____" regardless of what goes in the blank the steps are nearly always the same:

Identify which place value you are rounding to. The smaller the place value, the more accurate the final result will be.

Look to the next smallest place value, the digit to the right of the place value you're rounding to. For example, if you want to round to the nearest ten you'd look at the ones place.

If the digit in the next smallest place value is less than five (0, 1, 2, 3, or 4), you leave the digit you want to round to as-is. Any digits after that number (including the next smallest place value you just looked at) become zeros, or drop-off if they're located after the decimal point. This is called rounding down.

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3 0
3 years ago
Read 2 more answers
M AEB = 37°, what is m CED?
Oksana_A [137]
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6 0
3 years ago
Please help me with this question!!!!!​
Naddika [18.5K]

Answer:

Equation of line in slope-intercept form that passes through (4, -8) and is perpendicular to the graph y= \frac {2}{5} x - 3 is below

y = - \frac {5}{2} x + 2

Step-by-step explanation:

Slope of the equation  y= \frac{2}{5} x -3   is  m_1 = \frac{2}{5}

Since slopes of perpendicular lines are negative reciprocal of each other, therefore slope of other line is given as

m_2 = - \frac {1}{m_1}  = - \frac {5}{2}

Equation of line in point slope form is given as

y-y_1=m_2(x-x_1)

Here  (x1, y1) = (4, -8)

y+8 = - \frac{5}{2} (x-4)

Simplifying it further  

y = - \frac {5}{2} x + \frac {5}{2} 4 - 8

y = - \frac {5}{2} x + 2

6 0
3 years ago
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zepelin [54]

Answer:

C

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6 + 3(x + 4)

= 6 + 3x + 12

= 3x + 18

5 0
3 years ago
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