Suppose the heights of a population of male giraffes are normally distributed with an unknown population mean and a population standard deviation of 3.4 feet. A random sample of male giraffes from the population produces a sample mean height of x¯=15.2 feet.
What value of z should be used to calculate a confidence interval with a 90% confidence level?
Already registered? Login
Not Account? Sign up
Enter your email address to reset your password
Back to Login? Click here