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Question A measurement of fluoride ion in tooth paste from 5 replicate measurements delivers a mean of 0.14 % and a standard deviation of 0.05 %. What is the confidence interval at 95 % for which we assume that it contains the true value? and its uncertainty? a) 0.14 (+- 0.06) % b) 0.14 (+- 6.2) % c)0.14 (+-0.07)% d) 0.14(+-0.69)%

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Question

A measurement of fluoride ion in tooth paste from 5 replicate measurements delivers a mean of 0.14 % and a

standard deviation of 0.05 %. What is the confidence interval at 95 % for which we assume that it contains the true value? and its uncertainty?

a) 0.14 (+- 0.06) %

b) 0.14 (+- 6.2) %

c)0.14 (+-0.07)%

d) 0.14(+-0.69)%

 
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