(a) Compare (the mean of the means) with the class average. They are equal. Shou

Question

(a) Compare (the mean of the means) with the class average. They are equal. Should they be? Explain.

(b) One definition of an experiment well done is a small SDM. By what factor must we increase the number of darts thrown to decrease SDM by a factor of 4 if the sd remains the same?

(c) Through an examination of class total data from Table II, what would you give as an estimation (with an uncertainty) for the mean of the means of all physics lab classes throwing darts this week?

(d) If a random person in the class were to throw a single dart, what is the probability that it would land in bin 23? What about bin 29?

Explanation / Answer

use the formula of mean and variance

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