A population is distributed with a known standard deviation, =18 units. A random sample of size 45 is obtained from this population. The mean of this sample is 70 . 1. True or False: Since the sample size is areater than 25 the distribution of sample means from this population should be approximately normally distributed 2. What is the lower limit of the 95% contidence interval for the population mean ? ( 2dp ) 3. What is the upper limit of the 95% confidence interval for the population mean ? ( 2dp) 4. Baced on vour confidence interval. would vou believe that the true mean of this booulation could be 75