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Ket [755]
2 years ago
14

According to the 2010 U. S die senisa there are approximately 8 million people living in Virginia. this is 2.8 million less than

4 times the population of Nevada what is the population of Nevada the 1st top step is to what on both sides the 2nd step is to what on both sides the population of Nevada is blank a million
also IF YOU PLAY RO BLOX FRIEND ME IM C&P ANYONE WELCOME CheerChild2008 ​
Mathematics
1 answer:
Drupady [299]2 years ago
5 0

Answer:

Asking people to add you on roblex cringe

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A sample of 300 FM residents was taken and 135 said their favorite season was summer. Calculate a 99% confidence interval for th
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Answer:

The 99% confidence interval for the proportion of FM residents whose favorite season is summer is between (0.376, 0.524).

The lower bound of this interval is 0.376.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 300, \pi = \frac{135}{300} = 0.45

99% confidence level

So \alpha = 0.01, z is the value of Z that has a pvalue of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.45 - 2.575\sqrt{\frac{0.45*0.55}{300}} = 0.376

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.45 + 2.575\sqrt{\frac{0.45*0.55}{300}} = 0.524

The 99% confidence interval for the proportion of FM residents whose favorite season is summer is between (0.376, 0.524).

The lower bound of this interval is 0.376.

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