Chemistryeach member in 2 separate lab groups (group a and group

b. performed measurements using rulers, and their data is as follows. group a dа ta: 320 cm, 320 cm, 330 cm, 310 cm group b dа ta: 328 cm, 321 cm, 325 cm, 326 cm if the actual length is 321 cm, which group was more accurate and which group was more precise?

Question

Aleah James

Mathematics

19 November, 01:46

Chemistryeach member in 2 separate lab groups (group a and group

b. performed measurements using rulers, and their data is as follows. group a dа ta: 320 cm, 320 cm, 330 cm, 310 cm group b dа ta: 328 cm, 321 cm, 325 cm, 326 cm if the actual length is 321 cm, which group was more accurate and which group was more precise?

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Answers (1)

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Meredith Goodman · Answer 1

It is convenient to let a calculator or spreadsheet program compute the means and standard deviations for you. The (mean, standard deviation) for the two groups are about ...

... group 1: (320, 8.2)

... group 2: (325, 2.9)

The mean of the measurements of Group 1 was closer to the actual value, so we can say that group was more accurate.

The variation was smaller for Group 2, so we can say that group was more precise.