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3 years ago

True or false: the standard deviation is the square root of the variance.

Mathematics

1 answer:

Vilka [71]3 years ago

6 0

Why not look up "standard deviation" yourself, to be sure? But yes, the std. dev. is the sqrt of the variance.

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The variable y varies directly with the variable x.

Ivan

Answer:

D answer to dis question is 21

3 0

2 years ago

Mario can eat 21 hot dogs in 6 minutes. At the same place, how many minutes would it take him to eat 35 hot dogs?

anyanavicka [17]

Answer:

10 minutes

Step-by-step explanation:

Mario can eat e21 hot dog in 6 minutes

Let 35 hot dog eats in x minutes :

$\frac{35}{x} =\frac{21}{6} \\x=\frac{35(6)}{21} \\x=10 min$

Therefore, mario would eat 35 dogs in 10 min.

6 0

3 years ago

What is the best first step for solving the given system using substitution while avoiding fractions

Eduardwww [97]

Hi, hope you’re having a good day.

You should probably add an attachment.

Please do! Thanks, Have a great day! ❤️❤️

6 0

3 years ago

A sample proportion of 0.44 is found. To determine the margin of error for this statistic, a simulation of 100 trials is run, ea

salantis [7]

Answer:

margine of error = $\pm$ 0.13

Step-by-step explanation:

given data

sample proportion = 0.44

simulation trials = 100

sample size = 100

point estimate = 0.44

minimum sample proportion = 0.32

maximum sample proportion = 0.50

solution

we will get here first z score that is express as

$z = \frac{x-\mu }{\sigma }$ ............1

here x = 0.32and 0.50

$\mu = 0.44\\\sigma = \frac{x(max) - x(min)}{4} \\\sigma = \frac{0.50 - 0.32)}{4} = 0.045$

so z will be

$z1 = \frac{0.50 - 0.44 }{0.045 } = 1.35\\z2 = \frac{0.32 - 0.44 }{0.045 } = -2.66$

so now we get here margin of error that is express as

margin of error = $\pm \ z \times \sqrt{\frac{p(1-p)}{n}}$ ................2

we use here z heighervalue

margin of error = $\pm \ 2.66 \times \sqrt{\frac{0.44(1-0.44)}{100}}$

margine of error = $\pm$ 0.13

8 0

3 years ago

Read 2 more answers

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

blondinia [14]

Substitute y = 1/5 x + 1 into x + 5y = -15

x + 5y = -15

x + 5(1/5 x + 1) = -15

x + x + 5 = -15

2x = -20

x = -10

Plug in x = -10 into y = 1/5 x + 1

y = 1/5 (-10) + 1

y = -2 + 1

y = -1

(-10 , -1)

Answer is the last one

(-10 , -1)

3 0

2 years ago