What should be the average height of the population

The birth weights of children born in the United States are normally distributed and have a ?=7.5μ=7.5 pounds.  How does the median birth weight compare to the average birth weight?

Explain the effect of the standard deviation on power?

Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 44 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that ? = 7.50 ml/kg for the distribution of blood plasma. When finding an 99% confidence interval, what is the critical value for confidence level? (Give your answer to two decimal places.) zc =  (a) Find a 99% confidence interval for the population mean blood plasma volume in male firefighters. What is the margin of error? (Round your answers to two decimal places.) lower limit upper limit margin of error

The average score on a statistics test was 2.36 with a standard deviation of 0.69. The professor suspects that the test was very difficult; accordingly, he wishes to adjust the scores so that the mean is 3.97 and the standard deviation is 0.25. Calculate the a and b values so that the aX+b type adjustment gives the desired mean and variance? Calculate: a=  b=

Answer question 2 please

Find the probability that the mean for 20 randomly selected distances is greater than 195.70 cm.

A different investor decides to invest $8000 in Fund A and $3000 in Fund B. Assuming the amounts gained by the two funds are independent, what are the mean and standard deviation of the amount gained by this investment in the first month?

need range and standard deviation

Draw the Different normal curves.