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viktelen [127]
3 years ago
9

Hello Brainly User please help me I will mark brainliest. Its really east math please help me

Mathematics
1 answer:
ANEK [815]3 years ago
7 0
1. not function
not function
not function (i’m pretty sure)

2. not function
function
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A manufacturer of golf equipment wishes to estimate the number of left-handed golfers. A previous study indicates that the propo
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Answer:

A sample of 997 is needed.

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 z-score that has a p-value of 1 - \frac{\alpha}{2}.

The margin of error is of:

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

A previous study indicates that the proportion of left-handed golfers is 8%.

This means that \pi = 0.08

98% confidence level

So \alpha = 0.02, z is the value of Z that has a p-value of 1 - \frac{0.02}{2} = 0.99, so Z = 2.327.  

How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 2%?

This is n for which M = 0.02. So

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

0.02 = 2.327\sqrt{\frac{0.08*0.92}{n}}

0.02\sqrt{n} = 2.327\sqrt{0.08*0.92}

\sqrt{n} = \frac{2.327\sqrt{0.08*0.92}}{0.02}

(\sqrt{n})^2 = (\frac{2.327\sqrt{0.08*0.92}}{0.02})^2

n = 996.3

Rounding up:

A sample of 997 is needed.

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Step-by-step explanation:

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divide both sides by b

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If you need to put 28.93 gallons of ice cream into just cups, how many cups can you make out of these? Round to a whole number.
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Answer:

16 cups = 1 gallon

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Step-by-step explanation:

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