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3 years ago

Es el promedio de todos los datos.

Mathematics

1 answer:

mixas84 [53]3 years ago

7 0

Answer:

necesitas una foto para que yo te ayuda

Step-by-step explanation:

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The following list contains the number of movies that a group of 10 students saw in theaters in the past 12 months. 18, 15, 20,

tigry1 [53]

Place in ascending order: 4 6 8 15 15 17 17 18 20 20

middle numbers = 15 and 17

(15+17)/2 = 16

4 0

3 years ago

A researcher is investigating a government claim that the unemployment rate is less than 5%. To test this claim, a random sample

DerKrebs [107]

Answer:

The test statistic for this hypothesis test for a proportion is z=1.90.

Step-by-step explanation:

This is a hypothesis test for a proportion.

The claim is that the unemployment rate is less than 5%.

Then, the null and alternative hypothesis are:

$H_0: \pi=0.05\\\\H_a:\pi$

The sample has a size n=1500.

The sample proportion is p=0.061.

$p=X/n=92/1500=0.061$

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{\pi(1-\pi)}{n}}=\sqrt{\dfrac{0.05*0.95}{1500}}\\\\\\ \sigma_p=\sqrt{0.000032}=0.0056$

Then, we can calculate the z-statistic as:

$z=\dfrac{p-\pi-0.5/n}{\sigma_p}=\dfrac{0.061-0.05-0.5/1500}{0.0056}=\dfrac{0.0107}{0.0056}=1.90$

8 0

4 years ago

Soda Tak claims that Diet Tak has 40mg of sodium per can. You work for a consumer organization that tests such claims. You take

matrenka [14]

Answer:

-0.461

Step-by-step explanation:

By formula we know that z is equal to:

z = (x - m) / sd

of the statement we have the following information:

x is the reference value which is 40 mg

m = the sample mean is 42.4 mg,

sd = the standard deviation in all cans is 5.2 mg.

Replacing we have:

z = (40 - 42.4) /5.2

z = -0.461

Therefore the value of z is -0.461

4 0

4 years ago

Given segment CE and point D that lies on CE, find CD if CE= 11, CD= -16-3x, and ED= -13-2x

torisob [31]

Answer:Assuming all three, we shall find that each of the relations in 3:14 leads to a ... Then by 3:15 the relations AD//BC and AB||DE imply AD//CE, which excludes ... From 2:72, 3:11, 3:14, and 3:16 we deduce 3:19 If A, B, C are three distinct ... a point D lies between X and Y in AB/C if it belongs to XY/C, that is, if XY||CD

Step-by-step explanation:

7 0

3 years ago

The time to failure (in hours) of fans in a personal computer can be modeled by an exponential distribution with . Round your an

IRISSAK [1]

Answer:

Step-by-step explanation:

Assuming the decay factor, m = 0.0005

f(x) = $1 - e^{-mx}$

f(9000) = $1 - e^{-0.0005*9000}$ = 1 - 0.0111 = 0.99

5 0

3 years ago