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3 years ago

90 points please help question is in picture

Mathematics

2 answers:

slavikrds [6]3 years ago

6 0

Answer:

it should be 45%

denis-greek [22]3 years ago

5 0

Answer:

The probability is 45%

Step-by-step explanation:

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A stock market analyst notices that in a certain year, the price of IBM stock increased on 131 out of 252 trading days. Can thes

san4es73 [151]

Answer:

95% confidence interval for the proportion of days that IBM stock increases.

(0.45814 , 0.58146)

Step-by-step explanation:

Step:1

Given that a stock market analyst notices that in a certain year, the price of IBM stock increased on 131 out of 252 trading days.

Given that the sample proportion

$p^{-} = \frac{131}{252} = 0.5198$

Level of significance = 0.05

Z₀.₀₅ = 1.96

Step:2

95% confidence interval for the proportion of days that IBM stock increases.

$(p^{-} - Z_{0.05} \frac{\sqrt{p(1-p)} }{\sqrt{n} } , p^{-} + Z_{0.05} \frac{\sqrt{p(1-p)} }{\sqrt{n} } )$

$(0.5198 - 1.96(\sqrt{\frac{0.5198(1-0.5198)}{252} } , 0.5198 +1.96(\sqrt{\frac{0.5198(1-0.5198)}{252} })$

(0.5198 - 0.06166 , 0.5198+0.06166)

(0.45814 , 0.58146)

Final answer:-

95% confidence interval for the proportion of days that IBM stock increases.

(0.45814 , 0.58146)

3 0

3 years ago

3. Write and solve an equation to

Anna71 [15]

Answer:

$x = 27$

Step-by-step explanation:

Given

The attached figure

Required

Solve for x

3x and 45 are supplementary angles

So:

$3x + 45 = 180$

$3x =- 45 + 180$

$3x =135$

Solve for x

$x = 135/5$

$x = 27$

8 0

3 years ago

Help me out, thank you.

AveGali [126]

Answer: 38

Step-by-step explanation:

7 0

3 years ago

The tape diagram represents an equation, 1.75 Write an equation to represent the image.

rjkz [21]

Answer:

$5n=1.75$

Step-by-step explanation:

Given: tape diagram

To find: an equation to represent the image

Solution:

In the image, the area of the tape diagram indicating 1.75 is equal to the sum of areas of all the five parts in the diagram such that each part indicates n.

So, according to the given information, the equation is $5n=1.75$ .

Here, we have assumed that 1.75 represents an area of the first rectangle, and n represents the area of each of the small rectangle.

3 0

3 years ago

I need the Combination( probability) of this problem.

coldgirl [10]

Check attached image file.

8 0

3 years ago