Computing the pooled standard deviation. An experiment was
Chapter , Problem 12.3(choose chapter or problem)
Computing the pooled standard deviation. An experiment was run to compare three timed-release fertilizers in terms of plant growth. The sample sizes were 23, 21, and 27 plants, and the corresponding estimated standard deviations were 4, 5, and 7 centimeters. (a) Is it reasonable to use the assumption of equal standard deviations when we analyze these data? Give a reason for your answer. (b) Give the values of the variances for the three groups. (c) Find the pooled variance. (d) What is the value of the pooled standard deviation?
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer