Please show the work and solution way

1. Given the following blood pressure levels with a population standard deviation 6.38 of lo construct a 95% confidence -interval estimate of the population mean . 138 135 125 120 130 135 140 138 128 a simple random sample of 125 SAT scores has a mean of 1522. assume that SAT scores have a standard deviation of 333, Construct a 99% confidence interval estimate of the mean SAT score. 9, Confidence level: 95% , n= 23, 1 is unknown, population appears to be normally . distributed.. Find toyz and construct a 9510 confidence interval 19. a random sample of the birth weights of 186 babies has a mean of 3103 9 and a standard deviation of 696 9.. Construct a 90% confidence interval estimate of the mean birth weight of babies