subject
Mathematics, 22.06.2019 21:00 mathibhh4

If one of each model is measured for radiation and the results are used to find the measures of​ variation, are the results typical of the population of cell phones that are in​ use

Answers

ansver
Answer from: queenkimm26

Range = 1.48-0.63=0.850 W/kg

s= 0.320 W/Kg

s^2 = 0.320^2= 0.103 W^2 /kg^2

D. No, because some models of cell phones will have a larger market share than others. Measures from different models should be weighted according to their size in the population.

Step-by-step explanation:

For this case we have the following data values:

0.95,0.73,0.63,0.91,1.32,1.48,0.63,1.23,0.91,1.41,0.67

The first step on this case is order the datase on increasing way and we got:

0.63 0.63 0.67 0.73 0.91 0.91 0.95 1.23 1.32 1.41 1.48

The range is defined as Range = Max-Min

And if we replace we got:

Range = 1.48-0.63=0.850 W/kg

The sample standard deviation is given by this formula:

s= \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}

And if we replace we got s= 0.320 W/Kg

And the sample variance is just the standard deviation squared so we got:

s^2 = 0.320^2= 0.103 W^2 /kg^2

And for the last question about : If one of each model is measured for radiation and the results are used to find the measures of​ variation, are the results typical of the population of cell phones that are in​ use?

We can conclude this:

D. No, because some models of cell phones will have a larger market share than others. Measures from different models should be weighted according to their size in the population.

ansver
Answer from: lefthandeddolan

Range =1.41-0.66 = 0.75

\bar X = 1.171 W/Kg

s^2 = 0.0607

And taking the square root we got the sample deviation:

s = \sqrt{0.0607}= 0.246 W/kg

Step-by-step explanation:

For this case we have the following datset given:

0.83 1.39 1.39 1.03 0.66 1.26 1.39 1.18 1.41 1.19 1.15

We need to find the range, and the range is defined by:

Range = Max -Min

And replacinng we got:

Range =1.41-0.66 = 0.75

Then we can find the sample variance, but firt we need to find the sample mean with this formula:

\bar X = \frac{\sum_{i=1}^n X_i}{n}

And replacing we got:

\bar X = 1.171 W/Kg

Now we can find the sample variance with this formula:

s^2 = \frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}

And replacing we got:

s^2 = 0.0607

And taking the square root we got the sample deviation:

s = \sqrt{0.0607}= 0.246 W/kg

ansver
Answer from: graygraygray6402

D.​No, because some models of cell phones will have a larger market share than others. Measures from different models should be weighted according to their size in the population.

Step-by-step explanation:

(a) Range is the difference between the smallest and largest observation.

Here Smallest observation = 0.63

and Largest observation = 1.48

⇒ Range = 0.85

(b) Standard Deviation is calculate by,

Standard deviation(\sigma) = \sqrt{\frac{1}{n}\sum_{i=1}^{n}{(x_{i}-\bar{x})^{2}} }

where, \bar{x} is mean of the observation.

Here, Mean = 0.988

⇒ Standard Deviation = 0.313

(c) Variance is the square of Standard deviation.

Thus, Variance = (Standard Deviation)² = 0.098

(d) Here last option(D) is true i.e. ​No, because some models of cell phones will have a larger market share than others. Measures from different models should be weighted according to their size in the population.

Other questions on the subject: Mathematics

image
Mathematics, 21.06.2019 15:00, witerose701
Five dinosaurs go for a walk and come across some lovely chicken wings. their names are rexy, bronto, steggy, paly, and terry. there are exactly 5 dozen wings(equal enough for each dino to have a dozen right? ); however, terry is on a diet and he only eats 6 wings. if paly eats 2 more than terry, steggy eats 4 more than paly, and bronto and rexy eat the same amount because they are really hungry from not eating all day, how many chicken wings did each dino eat?
Answers: 1
image
Mathematics, 21.06.2019 17:00, ninjapig647
Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²
Answers: 1
image
Mathematics, 21.06.2019 21:40, angellynn581
The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.
Answers: 1
image
Mathematics, 21.06.2019 23:00, ldelgado97
What is the absolute value of -100000000000000?
Answers: 2
You know the right answer?
If one of each model is measured for radiation and the results are used to find the measures of​ var...

Questions in other subjects:

Konu
Mathematics, 01.05.2021 21:00
Questions on the website: 13535519