Given:
Sample size, n = 40
Sample mean, xb = $6.88
Population std. deviation, σ = $1.92 (known)
Confidence interval = 90%
Assume normal distribution for the population.
The confidence interval is
(xb + 1.645*(σ/√n), xb - 1.645*(σ/√n)
= (6.88 + (1.645*1.92)/√40, 6.88 - (1.645*1.92)/√40)
= (7.38, 6.38)
Answer: The 90% confidence interval is (7.38, 6.38)
Hi there!
c=11 2/3
<u><em>1.Convert 5 5/6 into mixed number:</em></u>
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<u><em>2.Convert 2 into fraction term:</em></u>
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<u><em>3.Convert both fraction into same denominator:</em></u>
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<u><em>4.Multiply the two terms:</em></u>
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<u><em>5.Simplfly the fraction term:</em></u>
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Therefore, c=11 2/3.
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A lot of people will die xD