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Maths question - standard deviation uncertainty

The output of a particular pH meter is known to have a standard deviation uncertainty of 0.04. This pH meter is used to measure the pH of a solution which has a true value of 8.65.
Calculate the probability that a single measurement will record a value greater than pH = 8.70.
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anshul95
11
Original post by geek-mode
The output of a particular pH meter is known to have a standard deviation uncertainty of 0.04. This pH meter is used to measure the pH of a solution which has a true value of 8.65.
Calculate the probability that a single measurement will record a value greater than pH = 8.70.

The measurements should be normally distributed with a mean of 8.65 and s.d. of 0.04. work out z= (8.70-8.65)/0.04 and work out what P(Z>z) is
Reply 2
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geek-mode
OP
Original post by anshul95
The measurements should be normally distributed with a mean of 8.65 and s.d. of 0.04. work out z= (8.70-8.65)/0.04 and work out what P(Z>z) is


is there a certain way you can work out P(Z>z)?
Reply 3
Avatar for anshul95
anshul95
11
Original post by geek-mode
is there a certain way you can work out P(Z>z)?

Well use stats tables ofc. Or a suitable programming language. Loads of online calculators too.
Reply 4
Avatar for mig213
mig213
Original post by geek-mode
is there a certain way you can work out P(Z>z)?


Use stats tables, or a suitable programming language. Many online calculators available too.

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