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kotykmax [81]
3 years ago
11

Pls help this is due in 6 minutes I will give u 100 points

Mathematics
2 answers:
ArbitrLikvidat [17]3 years ago
5 0

Answer: On call- 4 dollars, talk time- 3 dollars, talk time better deal, multiply by 60, no

Step-by-step explanation:

Sorry I answered a bit late so I'm hurrying for you.

vaieri [72.5K]3 years ago
4 0

Answer:

yep

Step-by-step explanation:

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HELP NEEDED! (Giving points) How many times greater is 3.4 than 1.7?
QveST [7]

Answer:

2

Step-by-step explanation:

Divide 3.4 by 1.7 and you get 2

4 0
3 years ago
Read 2 more answers
The range for the given domain of the function f(x)=3x-6/x+4.5 is
mash [69]
Hello,

We can not divide by 0.

==> x+4.5≠0
==>x≠-4.5

dom f=R\{4.5}
4 0
3 years ago
12. Using the value of 0.538 for the proportion of those surveyed who said they exercise at least 30 minutes three or more days
ICE Princess25 [194]

Answer:

ME=1.96\sqrt{\frac{0.538 (1-0.538)}{15235}}=0.00792    

The margin of error on this case is approximated \pm 0.792\% who is very clos to the +1% reported by the Gallup.

Step-by-step explanation:

Assuming this previous info : "Results are based on telephone interview conducted as part of the Gallup-Healthways Well-Being Index survey June 1–30,2013, with a random sample of 15,235 adults, aged 18 and older, living in all 50 U.S. states and the District of Columbia.

For results based on the total sample of national adults, one can say with 95% confidence that the maximum margin of sampling error is ±1 percentage point."

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 estimated proportion on this case is \hat p =0.538 and n =15235, the margin of error is given by:

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

And if we replace we got:

ME=1.96\sqrt{\frac{0.538 (1-0.538)}{15235}}=0.00792    

The margin of error on this case is approximated \pm 0.792\% who is very clos to the +1% reported by the Gallup.

5 0
3 years ago
Which expression is equivalent to: (5⁹ × 5⁻⁷)⁻² ?
lutik1710 [3]

Answer:

(6^4 x 2^-9)

Step-by-step explanation:

4 0
3 years ago
rue or false: It is common to denote random variables by upper-case letters and particular values of the random variables by the
jolli1 [7]

Answer:

true

Step-by-step explanation:

5 0
2 years ago
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