A random sample of n measurements was selected from a population with standard deviation o = 18 and unknown mean μ. Calculate a 90 % confidence interval for μ for each of the following situations: (a) n = 40, x= 75.7 < με (b) n = 60, x= 75.7 <με (c) n = 75, x = 75.7 OSASO fl

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A random sample of n measurements was selected from a population with standard deviation o = 18 and unknown mean μ. Calculate a 90 % confidence interval
for μ for each of the following situations:
(a) n = 40, x= 75.7
<με
(b) n = 60, x= 75.7
sus
(c) n = 75, x = 75.7
OSAS
the margin of error (width) of the confidence interval. (Enter:
(d) In general, we can say that for the same confidence level, increasing the sample size
"DECREASES", "DOES NOT CHANGE" or "INCREASES", without the quotes.)
Transcribed Image Text:A random sample of n measurements was selected from a population with standard deviation o = 18 and unknown mean μ. Calculate a 90 % confidence interval for μ for each of the following situations: (a) n = 40, x= 75.7 <με (b) n = 60, x= 75.7 sus (c) n = 75, x = 75.7 OSAS the margin of error (width) of the confidence interval. (Enter: (d) In general, we can say that for the same confidence level, increasing the sample size "DECREASES", "DOES NOT CHANGE" or "INCREASES", without the quotes.)
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