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Sergio039 [100]
3 years ago
7

The graph displays the distance a CO2 car traveled in a race. Help!!!

Mathematics
2 answers:
boyakko [2]3 years ago
5 0

Answer:

5 seconds per foot

Step-by-step explanation:

kari74 [83]3 years ago
5 0

Answer:A

Step-by-step explanation:

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The alternating current (AC) breakdown voltage of an insulating liquid indicates its dielectric strength. The article "Testing P
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Step-by-step explanation:

Hello!

Given the variable

X: breakdown voltage of an insulating liquid under certain conditions.

a)

Graphic in attachment.

Box: The median is closer to the third quartile than the first quartile showing skewness to the left.

The black dot in the middle of the box represents the sample mean (X[bar]) as you can see it is also moved to the right side of the distribution, affected by the presence of an outlier.

Whiskers:

The upper whisker is smaller than the lower one and there is a value that can be considered an outlier.

Altogether you can say that the distribution of the data set is skewed to the left.

b)

To estimate the population mean you need the population to be at least normal. The box plot shows that the distribution is not symmetrical but, considering that the sample size is n= 48 you can apply the Central Limit Theorem and approximate the sampling distribution to normal.

X[bar]≈N(μ;σ²)

As the distribution is approximate, using the sample standard deviation (since we don't know the population value) for the distribution standard deviation is also valid ⇒ Z= \frac{X[bar]-Mu}{\frac{S}{\sqrt{n} } }

X[bar] ± Z_{1-\alpha /2} * \frac{S}{\sqrt{n} }

∑X= 2626 ∑X²= 144950 n= 48

X[bar]= ∑X/n= 2626/48= 54.71

S²= 1/n[∑X²- (∑X)²/n]= 1/47[144950-(2626)²/48]= 27.36

S= 5.23

Z_{1-\alpha /2}= Z_{0.975}= 1.96

54.71 ± 1.96 * \frac{5.23}{\sqrt{48} }

[53.22; 56.18]kV

c)

95% CI

amplitude a=2 kV  i.e. semi amplitude d= 1 kV

The semi amplitude or margin of error for the CI can be calculated as:

d= Z_{1-\alpha /2} * \frac{S}{\sqrt{n} }

From this formula you can clear the sample size

\frac{d}{Z_{1-\alpha /2}} = \frac{S}{\sqrt{n} }

(\frac{d}{Z_{1-\alpha /2}} )*\sqrt{n} = S

\sqrt{n} = S* (\frac{Z_{1-\alpha /2}}{d} )

n = (S* (\frac{Z_{1-\alpha /2}}{d} ))^2

n= (5.23*(\frac{1.96}{1} ))^2= 105.08= 106

3 0
3 years ago
The ages of attendees at two different movies were randomly sampled. The data is in the double box plot. Drag each statement to
Naily [24]

Answer:

part B needs to change

Step-by-step explanation:

5 0
2 years ago
154=−4(8+6r) + 24r thanks to anyone who helps
vova2212 [387]

Answer:

When you do the math, you get an incorrect equation.

Step-by-step explanation:

154 = -32 -24r +24r

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4 0
2 years ago
What equals 104 in multipication
irga5000 [103]
 <span>The factor pairs are 1*104, 2*52, 4*26, and 8*13</span>
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3 years ago
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Select the correct answer. A new airline airplanes with two different seating configurations and has a policy where customers ar
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Answer:

  B. Configuration B has a higher probability of an aisle seat.

Step-by-step explanation:

Each configuration has the same number of seats in every row. That means we can determine the probability Dan will be assigned an aisle seat by considering only one row.

In configuration A, each row has 6 seats, of which 2 are aisle seats. The probability of being assigned an aisle seat is ...

  p(aisle) = 2/6 = 1/3 . . . . configuration A

In configuration B, each row has 9 seats, of which 4 are aisle seats. The probability of being assigned an aisle seat is ...

  p(aisle) = 4/9

Since 4/9 > 1/3, Dan should hope his flight uses configuration B.

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2 years ago
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