All categories

4 years ago

I need help now! I don’t get it

Mathematics

1 answer:

Mademuasel [1]4 years ago

8 0

The picture is off point so I can’t read the entire paper!! Sorry and GOOD LUCK

You might be interested in

Mr Changalls garden covers 2/5 of an acre of land .He divides the land into 4 equal sections .what fraction of an acre is each s

kakasveta [241]

1/10.
2/5 is equal to 4/10
4/10 divided by .4 is .1
so its 1/10

6 0

4 years ago

MIDNIGHT HOMEWORK -1 5/6 divided by (-3 1/3 plz help me

MA_775_DIABLO [31]

Answer:

11/20

Step-by-step explanation:

I turned them in to improper fractions, divided, then simplified

6 0

3 years ago

Find the mean of this set of numbers.

Marysya12 [62]

First step when finding the mean is to add all the values together
7 + -9 + 6 + -10 + -13 + -5
To make this easier, first add all the positive numbers 7 + 6 = 13
Then add (basically take away) the minus values one by one
13 - 9 = 4
4 - 10 = -6
-6 - 13 = -19
-19 - 5 = -24
Next step is to divide this total by the number of values there were
In this case, there were 6 values
-24 / 6 = -4
D. -4

8 0

3 years ago

Read 2 more answers

Koji is installing a rectangular window in an office building. The window is 8/2/3 feet wide and 5/3/4 feet high. The formula fo

777dan777 [17]

A=BH
SO A= (8/2*3)(5/3*4)ft^2= 80 ft^2 is the answer.

3 0

4 years ago

In early 2012, the Pew Internet and American Life Project asked a random sample of U.S. adults, "Do you ever ... use Twitter or

8090 [49]

Answer:

The confidence interval for the mean is given by the following formula:

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

And the confidence interval is given by:

(0.123, 0.177)

And for this case the interval contains the value 0.16, so then we can conclude at 5% of significance that the true proportion is not different from 0.16

Step-by-step explanation:

Previous concepts

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

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

Solution to the 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 confidence interval for the mean is given by the following formula:

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

And the confidence interval is given by:

(0.123, 0.177)

And for this case the interval contains the value 0.16, so then we can conclude at 5% of significance that the true proportion is not different from 0.16

3 0

4 years ago