Mathematics, 20.02.2020 03:37 Amazingboliver4518
Juan makes a measurement in a chemistry laboratory and records the result in his lab report. The standard deviation of students' lab measurements is σ = 13 milligrams. Juan repeats the measurement 5 times and records the mean x¯¯¯ of his 5 measurements. (a) What is the standard deviation of Juan's mean result? (That is, if Juan kept on making 5 measurements and averaging them, what would be the standard deviation of all his x¯¯¯′s?) (b) How many times must Juan repeat the measurement to reduce the standard deviation of x¯¯¯ to 2.6?
Answers: 3
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Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$
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Mathematics, 22.06.2019 02:30
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Juan makes a measurement in a chemistry laboratory and records the result in his lab report. The sta...
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