One sample Z test and t test exercise
1. The mean of murcury in blood level of population is 60 µg/dl. After health screening of 64 employees who work at the battery factory, they are found the mean of murcury in blood level is 68 µg/dl., standard deviation is 7.00 µg/dl.How does the researcher demonstrate hypothesis testing that the mean of murcury in blood level of population is different from the sample at the confidence interval 95%
2. The mean of cholesterol level in general population is 150 mg/dl . Fifteen hyperlipidemia patients have cholesterol average 220 mg/dl, variance 16. Please indicate hypothesis testing that hyperlipidemia patients have higher cholesterol level than in general population at the confidence level 99%