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sveticcg [70]
3 years ago
5

I need big help 10 points whoever answers

Mathematics
1 answer:
denpristay [2]3 years ago
7 0

Answer:

The answer to this question is not 36/25 but 6 1/10.

Step-by-step explanation:

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uhm pueden contestarme esto xfa- es para una amiga y tenemos que tener diferente respuestas si pueden claro :))
agasfer [191]

Answer:

hola

Step-by-step explanation:

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3 0
3 years ago
Determine the sample size needed to construct a 90% confidence interval to estimate the population proportion when p = 0.65 and
WINSTONCH [101]

Answer:

n=170

Step-by-step explanation:

1) Notation and definitions

n random sample taken (variable of interest)

\hat p=0.65 estimated proportion.

p true population

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{\hat p(1-\hat 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 90% of confidence, our significance level would be given by \alpha=1-0.90=0.1 and \alpha/2 =0.05. And the critical value would be given by:

z_{\alpha/2}=\pm 1.64

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 0.06 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{0.65(1-0.65)}{(\frac{0.06}{1.64})^2}=169.968  

And rounded up we have that n=170

6 0
3 years ago
What is y _ times x?
mart [117]

Answer:

Graph 1: Y is not a set number Graph 2: Y is 5

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Lynnette can wash 959595 cars in 5 days.<br> How many cars can Lynnette wash in 11 days?
aleksley [76]

Answer:

Lynnette can wash 2111109 in 11 days

Step-by-step explanation:

Have a good day :)

6 0
3 years ago
Erica and John are making brackets.Erica makes 25 bracelets John makes m More bracelets than Erica which expression represents t
pantera1 [17]

Answer: 50 + m

Step-by-step explanation:

From the question, Erica and John are making brackets and Erica makes 25 bracelets while John makes m more bracelets than Erica. The total number of bracelets made will be:

Erica bracelet = 25

John bracelet = 25 + m

Total bracelet = 25 + 25 + m

= 50 + m

The expression that represents the total number of bracelets Erica and John made is 50 + m

4 0
2 years ago
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