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Kazeer [188]
3 years ago
7

Find all zeros for (2x-1)(x-5)

Mathematics
1 answer:
NeTakaya3 years ago
5 0
To do this set each of the factors to 0:

2x - 1 = 0
2x = 1
x = 1/2

x - 5 = 0
x = 5

Hope this helps!
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This question is incomplete, the complete question;

The American Psychological Associated conducted a survey in 2003 of psychologists to estimate the average incomes for psychologists based on their academic degree and years of experience. 36 psychologists responded who had a just received their masters degree in 2003. The average was $48,800 with a standard deviation of $16,800.

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Answer:

at 95%, confidence interval is ( $43312, $54288 )

Step-by-step explanation:

Given the data in the question;

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now, confidence interval for population mean is given by the formula

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so we substitute

⇒ 48800 ±  1.96( 16800/√36 )

⇒ 48800 ±  1.96( 2800 )

⇒ 48800 ±  5488

⇒ 48800 -  5488, 48800 +  5488

⇒ ( 43312, 54288 )

Therefore, at 95%, confidence interval is ( $43312, $54288 )

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