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mihalych1998 [28]
3 years ago
6

The head of a computer science department is interested in estimating the proportion of students entering the department who wil

l choose the new computer engineering option. Suppose there is not information about the proportion of students who might choose the option. What size sample should the department head take if he wants to be 95% confident that the estimate is within 0.10 of the true proportion
Mathematics
1 answer:
olya-2409 [2.1K]3 years ago
8 0

Answer:

96

Step-by-step explanation:

From the given information:

At 95% Confidence interval level,Level of significance \alpha 0.05, the value of Z from the standard normal tables = 1.96

Margin of Error = 0.10

Let assume that the estimated proportion = 0.5

therefore; the sample size n can be determined by using the formula: n =(\dfrac{Z}{E})^2 \times p\times (1-p)

n =(\dfrac{1.96}{0.1})^2 \times 0.5\times (1-0.5)

n =(19.6)^2 \times 0.5\times (0.5)

n = 96.04

n \approx 96

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Which statement is true about the difference 2 square root of 7 − square root of 28 ?
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2 years ago
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Papessa [141]

Answer:

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Step-by-step explanation:

We have been given that an arrow is shot straight up from a cliff 58.8 meters above the ground with an initial velocity of 49 meters per second. Let up be the positive direction. Because gravity is the force pulling the arrow down, the initial acceleration of the arrow is −9.8 meters per second squared.

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Therefore, the function for the height of the arrow would be s(t)=-9.8t^2+49t+58.8.

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