If you could show the work you did that would be great! You don't have to provide a long explanation!

QUESTION 1 In a sample of 10 randomly selected women, it was found that their mean height was 63.4 inches. From previous studies, it is assumed that the standard deviation, o = 2.4. Construct the 95% confidence interval for the population mean. What is the lower limit of this confidence interval? Answer to 2 decimal places. QUESTION 2 A random sample of 150 students has a grade point average with a mean of 2.86 and with a population standard deviation of 0.78. Construct the 98% confidence interval for the population mean, . What is the upper limit to this confidence interval? Answer to 2 decimal places. QUESTION 3 Suppose a 95% confidence interval for u turns out to be (120, 310). To make more useful inferences from the data, it is desired to reduce the width of the confidence interval. Which of the following will result in a reduced interval width? Increase the confidence level Increase the standard deviation Increase the sample size Decrease the sample mean QUESTION 4 Construct a 99% confidence interval for the population mean, J. Assume the population has a normal distribution. A group of 19 randomly selected students has a mean age of 22.4 years with a standard deviation of 3.8 years. What is the lower limit of this confidence interval? Answer to 2 decimal places