All categories

3 years ago

I'm bored who wants to talk to me

Mathematics

1 answer:

Degger [83]3 years ago

5 0

Answer:

Step-by-step explanation:

mememmememmememeem

You might be interested in

A poll surveyed 503 video gamers, and 106 of them said they prefer playing games on a console rather than a computer. An executi

Kitty [74]

Answer:

The claim has no evidence to be supported.

On the contrary, there is enough evidence to support the claim that less than 25% of gamers prefer consoles.

Step-by-step explanation:

This is a hypothesis test for a proportion.

The sample has a size n=503.

The sample proportion is p=0.211.

p=X/n=106/503=0.211

The sample proportion is less than 25%, so we will test the claim that less than 25% of gamers prefer consoles.

Then, the null and alternative hypothesis are:

$H_0: \pi=0.25\\\\H_a:\pi$

The significance level is assumed to be 0.05.

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{\pi(1-\pi)}{n}}=\sqrt{\dfrac{0.25*0.75}{503}}\\\\\\ \sigma_p=\sqrt{0.000373}=0.019$

Then, we can calculate the z-statistic as:

$z=\dfrac{p-\pi+0.5/n}{\sigma_p}=\dfrac{0.211-0.25+0.5/503}{0.019}=\dfrac{-0.038}{0.019}=-1.9685$

This test is a left-tailed test, so the P-value for this test is calculated as:

$\text{P-value}=P(z$

As the P-value (0.0245) is smaller than the significance level (0.05), the effect is significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that less than 25% of gamers prefer consoles.

3 0

3 years ago

A bin contains 72 light bulbs of which 10 are defective. If 5 light bulbs are randomly selected from the bin with replacement, f

Serhud [2]

Answer:

0.4735

Step-by-step explanation:

10 defective, 62 not defective

P(good) = 62/72 = 31/36

All 5 good:

(31/36)⁵ = 0.4734738145

7 0

3 years ago

A car traveled a distance of 126 miles in 3 hours. Traveling at the same speed, what distance would this car travel in 7 hours?

Arte-miy333 [17]

First method: by the rule of three:
126 miles---------------------3 hours
x---------------------------------7 hours

x=(126 miles * 7 hours) / 3 hours=294 miles.

Answer: 294 miles.

Second method:
Speed=distance/ time ⇒distance=speed x time

We calculate the speed of the car:
Speed=126 miles/3 hours= 42 miles/hour.

Data:
Speed=42 miles/hour
time=7 hours

Distance=speed x time
Distance=(42 miles/hour)(7 hours)=294 miles

answer: 294 miles.

3 0

3 years ago

Jessica is a custodian at Oracle Arena. She waxes 20 m2 of the floor in 3/5 of an hour. Jessica waxes the floor at a constant ra

Ghella [55]

to solve this, you need to set up an equation to solve for x, the number of square meters waxed in an hour:

$\frac{20}{3/5} = \frac{x }{1 }$

you can use cross multiplication to solve for x:

$\frac{3}{5} x = 20$

$3x = 100\\x = 100/3$

so jessica can wax 100/3 square meters per hour. you can convert this to decimal form (which would be 33.3 repeating) or you can leave it in fraction form.

6 0

3 years ago

Find the missing angle.

Alina [70]

Answer:

sorry bro just wanted the points but thanks have a great day

Step-by-step explanation:

3 0

3 years ago

I'm bored who wants to talk to me​

I'm bored who wants to talk to me