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2 years ago

6

I WILL MARK BRAINLIEST FOR THIS!!!!!!!!!!!

1 answer:

igomit [66]2 years ago

6 0

Answer:

She gets a job as a lawyer after graduation.

Step-by-step explanation:

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The weight of an African elephant is 6 × 106 grams; the weight of a tiger is 3 × 105 grams. How many times heavier is the elepha

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4 years ago

1/3 is greater or less than 1

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3 years ago

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Keisha wants to estimate the percentage of managers at her company that hold an MBA. She surveys 320 managers and finds that 70

kondor19780726 [428]

Answer:

The margin of error is of 0.038 = 3.8%.

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:

$n = 320, \pi = \frac{70}{320} = 0.21875$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$M = 1.645\sqrt{\frac{0.21875(1-0.21875)}{320}}$

$M = 0.038$

The margin of error is of 0.038 = 3.8%.

6 0

4 years ago