Answer the following

y . Apply your skills in Solv 1. A researcher found that the IQ scores of the ALS students in the Division of Quezon Province are normally distributed with a mean of 110 and a standard deviation of 10. a. How many ALS students are needed to test so that the estimate will not be more than 5 from the population mean with a 99% level of confidence? b. Due to limited contact with ALS students, the researcher tested a small number of ALS students. Explain the effect of this small sample on the estimate of the parameter? 2. A confidence interval estimate has a maximum error of 2.50. If the distribution of the data where the estimate is obtained is normal with a standard deviation of 9, a. How many samples are considered in 98% confidence interval estimate for the mean? b. What must be done to the sample size to reduce the margin of error of the confident interval estimate? Support your