Compute the range and variance

Reference no: EM131384511

Consider the data in Exercise 1 on the time (in minutes) to process hot-rolled steel for a sample of size 10.

(a) Find a 98% confidence interval for the mean time to process hot-rolled steel. What assumptions do you have to make to solve this problem?

(b) Find a 95% confidence interval for the variance.

Exercise
The following times(in minutes) to process hot-rolled steel are observed for a random sample of size 10:

5.4 6.2 7.9 4.8 7.5
6.2 5.5 4.5 7.2 6.2

(a) Find the mean, median, and mode of the processing times. Interpret the differences between them.

(b) Compute the range, variance, and standard deviation of the processing times and interpret them.

Reference no: EM131384511

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