A group of students took turns using a laboratory balanceto weigh the water contained in a beaker. The results theyreported were 111.42 g, 111.67 g, 111.21 g, 135.64 g,111.02 g, 111.29 g, and 111.42 g.(a) Should any of the data be excluded before the average is calculated?(b) From the remaining measurements, calculate the average value of the mass of the water in the beaker.(c) Calculate the standard deviation s and, from it, the 95% confidence limit.
A group of students took turns using a laboratory balanceto weigh the water contained in a beaker. The results theyreported were 111.42 g, 111.67 g, 111.21 g, 135.64 g,111.02 g, 111.29 g, and 111.42 g.(a) Should any of the data be excluded before the average is calculated?(b) From the remaining measurements, calculate the average value of the mass of the water in the beaker.(c) Calculate the standard deviation s and, from it, the 95% confidence limit.
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 113CP: On October 21, 1982, the Bureau of the Mint changed the composition of pennies (see Exercise 120)....
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A group of students took turns using a laboratory balance
to weigh the water contained in a beaker. The results they
reported were 111.42 g, 111.67 g, 111.21 g, 135.64 g,
111.02 g, 111.29 g, and 111.42 g.
(a) Should any of the data be excluded before the average
is calculated?
(b) From the remaining measurements, calculate the average value of the mass of the water in the beaker.
(c) Calculate the standard deviation s and, from it, the
95% confidence limit.
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