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3 years ago

Why might the range not be the best estimate of variability?

2 answers:

5 0

It may be because the range isn't actually considered an average, it's shown using a box and whiskers diagram, Mode is the most common number. Mean is all the numbers added up and divided by the amount of values there are in the adding up process. so overall the range is less useful to show variability as it only shows the lowest and highest number in the data, and not the different individual numbers variety amongst the results

UNO [17]3 years ago

4 0

Answer:

Range does not measure the spread of the majority of values in a data set.

Step-by-step explanation:

We are asked to tell why the range might not be the best estimate of variability.

We know that range is the difference between the upper data and lower data point of a data set.

We know that variability determines the spread of a data.

When a data set has large values data outliers, then it will affect the spread.

Let us take an example of the following data set.

$1,2,2,2,5,5,5,6,6,6,7,7,7,8,8,201$

The range of the data would be $201-1=200$ , while all the data points except 201 are 1 away from each other.

Since range does not measure the spread of the majority of values in a data set, therefore, the range is not the best estimate of variability.

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An astronaut on the moon throws a baseball upward. The astronaut is 6 ft 6 in tall, and the initial velocity of the ball is 40 f

weqwewe [10]

Answer:

t = 0.293 s and 14.52 s

Step-by-step explanation:

The heights of the ball in feet is given by the equation as follows :

$S = -2.7t^2+40t+6.5$

Where t is the number of seconds after the ball was thrown.

We need to find is the ball 18 ft above the moon's surface.

Put S = 18 ft

$-2.7t^2+40t+6.5=18\\\\-2.7t^2+40t=18-6.5\\\\-2.7t^2+40t-11.5=0$

It is a quadratic equation. Its solution is given by :

$t=\dfrac{-40+\sqrt{40^{2\ }-4\left(-2.7\right)\left(-11.5\right)}}{2\left(-2.7\right)},\dfrac{-40-\sqrt{40^{2\ }-4\left(-2.7\right)\left(-11.5\right)}}{2\left(-2.7\right)}\\\\t=0.293\ s,14.52\ s$

So, the ball is at first 0.293 s and then 14.52 s above the Moon's surface.

8 0

3 years ago

Please help<br><br> Solve the inequality.<br> -1 < 2x + 5 < 4<br> [?] sxs H

ser-zykov [4K]

Answer:

-1-5<2x+5-5<4-5

-6<2x<-1

-3<x<-1/2

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2 years ago

Last month you spent $20 on clothing. This month you spent 180% of what you spent last month. How much did you spend this month?

frutty [35]

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2 years ago

Evaluate the expression 4+−4√2+−1√ and write the result in the form a+bi.

castortr0y [4]

In the expression, the real number a equals 12 and the real number b equals -16.

<h3>How to explain the information?</h3>

It should be noted that the expression given is:

= (4 - 2i)²

Therefore, we need to expand the expression. This will be:

= (4 - 2i)(4 - 2i)

= 16 -8i -8i + 4i²

= 16 -16i +4i²

Substitute -1 for i²

= 16 - 16i + 4(-1)

= 16 - 16i - 4

= 12 - 16i

Therefore, the value of the expression is 12 - 16i.

Learn more about expressions on:

brainly.com/question/723406

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Evaluate the expression ( 4 − 2 i )² and write the result in the form a + b i.

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2 years ago

Express the following numbers as a product of their prime factors <br> 24<br> Please show working

Studentka2010 [4]

Answer:

2 x 2 x 2 x 3

Step-by-step explanation:

Find two numbers that multiply together to form 24:

2 x 12 = 24

Find two numbers that multiply together to form 12, a factor of 24. Replace 12 with these numbers:

2 x (2 x 6) = 2 x 12 = 24

Find two numbers that multiply together to form 6, a factor of 12. Replace 6 with these numbers:

2 x (2 x (2 x 3)) = 2 x (2x6) = 2 x 12 = 24

Two and three cannot be factored any further, therefore the prime factors of 24 are 2, 2, 2, and 3.

8 0

3 years ago