The heights of newborn babies are normally distributed with an unknown population mean and a population...
The heights of newborn babies are normally distributed with an unknown population mean and a population standard deviation of 10 centimeters. A random sample of babies from the population produces a sample mean height of x¯=50 centimeters.
Use Excel to find the value of z that should be used to calculate a confidence interval with a 90% confidence level.
Round your answer to three decimal places.
Homework Answers
We have here,
Z critical value =1.645...................by using Excel =NORMSINV(1-(0.1/2))
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