per liter (pCI/L). The radon level is less than 4 pCI/L. A housing development has 102...

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per liter (pCI/L). The radon level is less than 4 pCI/L. A housing development has 102 residential homes. The would like to estimate the average radon level in the development Because it would be too ex to measure every home, a random sample of 28 homes was selected radon levels in homes is 0.5 pCI/L. Complete parts a and b below to be tested, and the average radon level was found to be 1.1 pCI/L Assume from past studies the population standard deviation o Construct a 90% confidence interval to estimate the average radon level in the housing development The 90% confidence interval to estimate the average radon level is pCULüpou) (Round to two decimal places as needed.)

math Statistics-And-Probability

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Answer 1

Answer #1

a.

M = 1.1
t = 1.64
s_M = √(0.5²/28) = 0.09

μ = M ± Z(s_M)
μ = 1.1 ± 1.64*0.09
μ = 1.1 ± 0.155

90% CI [0.945, 1.255]

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Answer 2

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per liter (pCI/L). The radon level is less than 4 pCI/L. A housing development has 102...

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