Multiple ChoiceWhat is wrong with expressing the confidence interval 3.8<σ2<6.43.8<\(\sigma\)^2<6.4 as σ2=5.1±1.3\(\sigma\)^2=5.1\(\pm\)1.3?35views
Multiple ChoiceA delivery service tracks the weights of its packages. A sample of 20 packages has a variance of 4.5 lbs2. Construct a 95% conf. int. for the population variance. Assume a normal distribution.30views