3. The following numbers represent the IQs of (a random sample of) n = 5 lazy...

Question

Question

3. The following numbers represent the IQs of (a random sample of) n = 5 lazy students before and after just one: n 1 4 5 Bef

math Statistics-And-Probability

Answer 1

Answer #1

The necessary calculation doane below.

Here n=5,

s=standard deviation = sqrt(sum( d-dbar)^2)/4) = sqrt(16/4)= 2

The 95 % confidence interval for overall average decreases is IQ's for lazy student is given by

( dbar- t(0.025) * s/ sqrt(n), dbar+ t(0.025) * s/ sqrt(n))

(5-2.776* 2/sqrt(5) , 5+2.776* 2/sqrt(5))

(5- 2.4833, 5+ 2.4833)

(2.5167, 7.4833)

Answer 2

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