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MakcuM [25]
3 years ago
6

Use the normal distribution to find a confidence interval for a proportion p given the relevant sample results. Give the best po

int estimate for p, the margin of error, and the confidence interval. Assume the results come from a random sample. A 95% confidence interval for p given that p ^ = 0.7 and n = 130 Round your answer for the point estimate to two decimal places, and your answers for the margin of error and the confidence interval to three decimal places. point estimateequals margin of errorequals plus-or-minus The 95% confidence interval is to:__________.
Mathematics
1 answer:
Rama09 [41]3 years ago
7 0

Answer:

SIMPLE go below to see

Step-by-step explanation:

idk im dumb

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Use photo math it works great
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In a art class, there are 32 pens to 40 brushes what is the ratio of pens to brushes written as a fraction in simplest form ?
kolezko [41]
32/40 is the fraction to 32:40 and if u simplify it, it would be 4/5
4 0
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Two airplanes leave the same airport. One heads north, and the other heads east. After some time, the northbound airplane has tr
Fofino [41]

Answer:

17 miles

Step-by-step explanation:

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17

7 0
3 years ago
A bridge is built in the shape of a parabolic arch. The bridge arch has a span of 166 feet and a maximum height of 40 feet. Find
scoray [572]

Answer:

38.27775 feet

Step-by-step explanation:

The bridge has been shown in the figure.

Let the highest point of the parabolic bridge (i.e. vertex of the parabola) be at the origin, O(0,0) in the cartesian coordinate system.

As the bridge have the shape of an inverted parabola, so the standard equation, which describes the shape of the bridge is

x^2=4ay\;\cdots(i)

where a is an arbitrary constant (distance between focus and vertex of the parabola).

The span of the bridge = 166 feet and

Maximum height of the bridge= 40 feet.

The coordinate where the bridge meets the base is A(83, -40) and B(-83, -40).

There is only one constant in the equation of the parabola, so, use either of one point to find the value of a.

Putting A(83,-40) in the equation (i) we have

83^2=4a(-40)

\Rightarrow a=-43.05625

So, on putting the value of a in the equation (i), the equation of bridge is

x^2=-172.225y

From the figure, the distance from the center is measured along the x-axis, x coordinate at the distance of 10 feet is, x=\pm 10 feet, put this value in equation (i) to get the value of y.

(\pm10)^2=-172.225y

\Rightarrow y=-1.72225 feet.

The point P_1(10,-1.72225) and P_2(-10,-1.72225) represent the point on the bridge at a distance of 10 feet from its center.

The distance of these points from the x-axis is d=1.72225 feet and the distance of the base of the bridge from the x-axis is h=40 feet.

Hence, height from the base of the bridge at 10 feet from its center

= h-d

=40-1.72225=38.27775 feet.

8 0
3 years ago
- b. Yolanda played a new number game with Xavier. She used this equation to generate her response to each number Xavier said: y
Arisa [49]

(a) One possibility is 8.45

Rounded to the nearest integer = 8

Rounded to the nearest tenth = 8.5

And rounding this to the nearest integer = 9

 

(b) The possible numbers are 8.45 to 8.49, inclusively

3 0
3 years ago
Read 2 more answers
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