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It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of the mean for this group is ___________ and the 90% confidence interval for this group is ____________________.
a. 100; (100.26; 103.74)
b.102; (100.26; 103.74)
c.100; (98.26; 101.74)
d.102; (98.26; 101.74)
Use the Empirical Rule to estimate the proportion of costs within two standard deviations of the mean. What are these limits?
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