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vampirchik [111]

3 years ago

8

When might the inter-quartile range be better for describing a data set than the range?

2 answers:

g100num [7]3 years ago

6 0

Answer: If the data has outliers

Step-by-step explanation:

The range is defined as the difference between the maximum and minimum data values in a data set. It give the estimate of the spread of the data.

The interquartile range in statistics is defined as the difference between the first and the third quartiles. It also gives the estimate of the spread of the data.

But if a data has outliers then it might not give a true estimation of the spread of data. Then the interquartile range would be better for describing the spread of a data set than the range because in ineterquartile range we exclude the outliers so that the interquartile range works .

Bess [88]3 years ago

5 0

If the data has outliers

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kiruha [24]

Answer:

No solution

Step-by-step explanation:

We have

$\sum_{x=8}^{4}x^2 + 9\left(\dfrac{\cos^2(\infty)}{\sin^2(\infty)} \right)$

For the sum it is not correct to assume

$\sum_{x=8}^{4}x^2= 8^2 + 7^2+6^2+5^2+4^2 = 64+49+36+25+16 = 190$

Note that for

$\sum_{x=a}^b f(x)$

it is assumed $a\leq x \leq b$ and in your case $\nexists x\in\mathbb{Z}: a\leq x\leq b$ for $a>b$

In fact, considering a set $S$ we have

$\sum_{x=a}^b (S \cup \varnothing) = \sum_{x=a}^b S + \sum_{x=a}^b \varnothing$ that satisfy $S = S \cup \varnothing$

This means that, by definition $\sum_{x=a}^b \varnothing = 0$

Therefore,

$\sum_{x=8}^{4}x^2 = 0$

because the sum is empty.

For

$9\left(\dfrac{\cos^2(\infty)}{\sin^2(\infty)} \right)$

we have other problems. Actually, this case is really bad.

Note that $\cos^2(\infty)$ has no value. In fact, if we consider for the case

$\lim_{x \to \infty} \cos^2(x)$ , the cosine function oscillates between $[-1, 1]$ , and therefore it is undefined. Thus, we cannot evaluate

$9\left(\dfrac{\cos^2(\infty)}{\sin^2(\infty)} \right)$

and then

$\sum_{x=8}^{4}x^2 + 9\left(\dfrac{\cos^2(\infty)}{\sin^2(\infty)} \right)$

has no solution

7 0

3 years ago

How many centimeters are in 15 yards?

Ann [662]

Answer:

1371.6 (cm) are in 15 yards

Step-by-step explanation:

1371.6 centimeters are in 15 yards since 1 yard is equal to 91.44.

8 0

3 years ago

Read 2 more answers

8*1,000,000+8*1/1,000,000

iren [92.7K]

Answer:

Step-by-step explanation:

8000000

<em>Hope that helps!</em>

8 0

3 years ago

Read 2 more answers

In a race, there are 14 runners. Trophies for the race are awarded to the runners finishing in first through fourth place. In ho

iVinArrow [24]

Slot method or permutations
14*13*12*11=24024
there are 24024 ways that have different winners

8 0

3 years ago

Read 2 more answers

What is the probability of drawing two aces in a row from a deck of 52 cards, replacing the first card and reshuffling the deck?

sineoko [7]

Answer:

1/169

Step-by-step explanation:

There are 4 aces in a deck of 52.

The probability that the first card is an ace is 4/52.

Since the card is replaced, the probability that the second card is an ace is also 4/52.

The total probability is (4/52) (4/52) = 1/169.

5 0

3 years ago