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3 years ago

I don’t understand. online school is hard

Mathematics

2 answers:

kozerog [31]3 years ago

3 0

Answer: it is hard :((

Step-by-step explanation:

umka21 [38]3 years ago

3 0

Answer:

i don't know but this is from a month ago, so im gonna suspect that you don't need it anymore

Step-by-step explanation:

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What is the solution set of the quadratic inequality x^2+x-2>=0?

Firlakuza [10]

I think it’s gonna be the 3rd one

3 0

3 years ago

Solve 2x + 3 = 9 nowwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww

Stels [109]

Answer:

x=3

Step-by-step explanation:

We want to find the variable

, so we have to make it alone. To do so, first subtract

from both sides of the equation:

−

Now divide both sides by

So the final answer is:

Hope this helps!

5 0

3 years ago

Read 2 more answers

(a) A newspaper conducted a statewide survey concerning the 1998 race for state senator. The newspaper took a SRS of 1200 regist

Sladkaya [172]

Answer:

n=9604

Step-by-step explanation:

1) Notation and definitions

$X=620$ number of people that would vote for the Republican candidate

$n=1200$ random sample taken

$\hat p=\frac{620}{1200}=0.517$ estimated proportion of people that would vote for the Republican candidate

$p$ true population proportion of people that would vote for the Republican candidate

Me= 0.01 represent th margin of error.

Confidence =0.95 or 95%

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

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

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: