Mathematics, 25.02.2020 05:00 xojade

During a rock concert, the noise level (in decibels) in front row seats has a mean of 95 dB with a standard deviation of 8 dB. Without assuming a normal distribution, find the minimum percentage of noise level readings within 3 standard deviations of the mean. (Round your answer to 2 decimal places.)

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Answer from: niyawilliams23

Minimum 88.89% percentage of noise level readings within 3 standard deviations of the mean.

Step-by-step explanation:

We are given the following in the question:

Mean = 95 dB

Standard Deviation = 8 dB

Chebyshev's Rule:

Atleast $1-\dfrac{1}{k^2}$ percent of data lies within k standard deviation of mean for a non-normal data.For k = 3

$1-\dfrac{1}{(3)^2} = 88.89\%$

Thus, minimum 88.89% percentage of noise level readings within 3 standard deviations of the mean.

Answer from: Buddy01

The minimum percentage of noise level readings within 3 standard deviations of the mean = 88.89% .

Step-by-step explanation:

We are given in the question that the noise level (in decibels) in front row seats has a mean of 95 dB with a standard deviation of 8 dB.

Also, it is not stated that data is normally distributed.

So, according to Chebyshev's theorem it has been stated that percentage of the data that lies within k standard deviations of the mean equals at least $1-\frac{1}{k^{2} }$ where, k > 1.

So, according to our question, k = 3

Minimum percentage of noise level readings within 3 standard deviations of the mean = $(1-\frac{1}{3^{2} })*100$ = $(1-\frac{1}{9 })*100$ = $\frac{8}{9} *100$ = 88.89% .

Hence, 88.89% is the minimum percentage of noise level readings within 3 standard deviations of the mean.

Answer from: Quest

42%

step-by-step explanation:

we know,

total people = 60

total males = 25

percentage of males

= 25/60 × 100

= 25/6 × 10

= 25/3 × 5

= 125 / 3

= 41.

rounding of = 42%

happy to

pls mark as brainliest

Answer from: Quest

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

$\frac{ab}{bc} =\frac{ad}{ab}$

now, we can cross multiply

and we get

$ab\timesab=ad\times bc$

$ab^2=ad\times bc$

so, this could be step to prove it

Seth is using the figure shown below to prove pythagorean theorem using triangle similarity: in the

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During a rock concert, the noise level (in decibels) in front row seats has a mean of 95 dB with a s...