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FromTheMoon [43]
3 years ago
14

X+1.5 (x-3)=5/2 solve pls help me it's an immediate thing I will give 20 p for it

Mathematics
1 answer:
Yuki888 [10]3 years ago
7 0
X+ 1.5x - 4.5 = 5/2
2.5x - 4.5 = 5/2
2.5x = 5/2 + 4.5
2.5x = 7
x = 7/2.5

X = 2.8
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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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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.

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98% confidence level

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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}}

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

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