1)

\f\f\f\fAssume lhatihe sample is a simple random sample obtained from a normally distributed populalion of IQ scotes of statistics professors Use the table below to nd lhe minimum sample size needed to be 99% condent that the sample slandatd deviation 3 is wilhin 410% of U. Islhis sample size practical? To be 95% condent that s is within of the value of a. the sample size n should beat least 19,205 768 192 48 21 12 8 To be 99% condent that s is within of the value of a. the sample size n should be at least 1% 5% 10% 20% 30% 40% 50% 1% 5% 10% 20% 30% 40% 50% 33.21 1,336 335 85 31! 22 14 The minimum sample size needed is \f