X = 8 9 10<br> Plzzz helpppo

What is the value of the x?

Ronch [10]

Answer:

53

Step-by-step explanation:

37+90=127

180-127=53

7 0

3 years ago

Betsy is collecting coins she has 25quarters 3times as many nickels than quarters and2times as many pennies than nickels how man

babunello [35]

YEAH I CAN TELL YOU A LAME LOL

4 0

4 years ago

preliminary sample of 100 labourers was selected from a population of 5000 labourers by simple random sampling. It was found tha

VladimirAG [237]

Answer:

$n=\frac{0.4(1-0.4)}{(\frac{0.05}{1.96})^2}=368.79$

n=369

Step-by-step explanation:

1) Notation and definitions

$X=40$ number of the selected labourers opt for a new incentive scheme.

$n=100$ random sample taken

$\hat p=\frac{40}{100}=0.4$ estimated proportion of the selected labourers opt for a new incentive scheme.

$p$ true population proportion of the selected labourers opt for a new incentive scheme.

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

2) Solution tot he problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by:

$z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96$

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

And on this case we have that $ME =\pm 0.05$ and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

And replacing into equation (b) the values from part a we got:

$n=\frac{0.4(1-0.4)}{(\frac{0.05}{1.96})^2}=368.79$

And rounded up we have that n=369

8 0

3 years ago

Write an equation of the line.

vladimir2022 [97]

I believe it’s y=4x+4 :)
The slop intercepts the y axis at positive 4, which gives us the y intercept
If you use the rise over run technique to find the slope you’ll get 4/1, meaning the slope is 4

8 0

3 years ago

I will give extra points please help

weqwewe [10]

Answer:

7

Step-by-step explanation:

<u>3 </u>+ 4 = 7.

So, therefor, x = 3

6 0

3 years ago

X = 8 9 10 Plzzz helpppo