Lifetimes of WristwatchesA random sample of the lifetimes of 23 inexpensive wristwatches has a standard deviation of 3.9 months. Assume the variable is normally distributed. Use the chi-square distribution table to find any chi-square values to three decimal places. Round your final answers to one decimal place.
Find the 90% confidence intervals for the variance and standard deviation.
Do you feel that the lifetimes are relatively consistent?
Already registered? Login
Not Account? Sign up
Enter your email address to reset your password
Back to Login? Click here