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Pavel [41]
3 years ago
14

Why is it best to compare medians and interquartile ranges for these​ data, rather than comparing means and standard​ deviations

? A. Some of these data have vastly different​ centers, and the median and interquartile range provide more reliable information in these circumstances. B. These data are fairly symmetric and do not have​ outliers, and the median and interquartile range provide more reliable information in these circumstances. C. Some of these data have outliers​ and/or are​ skewed, and the median and interquartile range are resistant to outliers. D. Some of these data have outliers​ and/or are​ skewed, and the median and interquartile range amplify the effects of outliers and skewness.
Mathematics
1 answer:
Elanso [62]3 years ago
8 0

Answer:Some of these data have outliers​ and/or are​ skewed, and the median and interquartile range are resistant to outliers.

Step-by-step explanation:

Outliers often characterize a lot of data. Outliers are extreme values which have obvious impact on the value of the standard deviation of a given distribution.

However, the median and interquartile range are resistant to outliers hence they can be used even in the presence of outliers in the distribution.

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Joe can cut and split a cord of firewood in 3 fewer hours than Dwight can. When they work​ together, it takes them 2 hours. How
aalyn [17]

Answer:

Dwight will take 6 hours to finish the job alone and Joe will take 3 hours to finish the job alone.

Step-by-step explanation:

Let us assume the time taken by Dwight to split a cord of firewood  = K hrs

So, the per hour rate of Dwight  = (\frac{1}{K})

As, Joe uses 3 LESS hours then Dwight.

So, the time taken by Joe to split a cord of firewood  = (K- 3) hrs

So, the per hour rate of Joe  = (\frac{1}{K-3})

Now, when both of them wok together, it takes them 2 hours.

So, the per hour rate of BOTH of them  = (\frac{1}{2})

⇒ Per hour rate of ( Dwight  + Joe)  =(\frac{1}{2} )

\implies (\frac{1}{K}) +  (\frac{1}{K-3}) = (\frac{1}{2})

Now, solving for the value of K , we get:

(\frac{1}{K}) +  (\frac{1}{K-3}) = (\frac{1}{2})\\\implies  \frac{(K-3) + K}{K (K-3)}  = (\frac{1}{2})\\\implies 2(2K -3) = K^2 - 3K\\\implies k^2 - 3K -4K +6 = 0\\\implies K^2 - 7K  + 6=  0\\\implies K^2 - 6K - K  + 6=  0\\\implies K(K-6) -1(K - 6)=  0\\\implies (K-6)(K-1) = 0

Implies either K = 6 Or K = 1

But if K = 1, (K-3)  = 1- 3  = -2 hours would be A CONTRADICTION.

⇒ K  = 6 hours

Hence, Dwight will take 6 hours to finish the job alone and Joe will take (k-3) = (6-3) = 3 hours to finish the job alone.

8 0
3 years ago
WILL GIVE BRAINLIEST TO BEST ANSWER! HELP ASAP!
Aleks [24]

Answer:

120 ft

Step-by-step explanation:

The distance the gravel covers is the total distance times the percentage that the gravel covers

We know the gravel covers 66 ft and the percentage is 55%

distance gravel = total distance * percentage

66 = total distance * 55%

66 = total distance *.55

Divide each side by .55

66/.55 = total distance *.55/.55

120 = total distance

8 0
3 years ago
What is the inverse of the function f(x) = x – 12?
Luda [366]

Answer:a


Step-by-step explanation:

h(x)=x-12

h(x)=4x-48

h(x)=-1(4x-48)

h(x)=-4x+48

h(x)=48-4x

7 0
3 years ago
In a Walk for charity you walk at a rate of 100 meters per minute how long does it take you to walk 2 km
Monica [59]
1 kilometer= 1,000 meters.
2 kilometers= 2,000 meters 
she can walk that far in 20 minutes


P.S. please give me brainliest answer. I need it!
7 0
3 years ago
Algebra one quiz 12.2.3
Montano1993 [528]

Answer:

where is link

Step-by-step explanation:

6 0
3 years ago
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