Recent content by annova

...rate per min, and the standa? A Geiger counter measure 750 counts in 5.0 min. a) determine the average counting rate per min, and the standard deviation of the counting rate. b) find the fractional error. c) how long would you want to count to get a fractional error of 1% ?

in any 10 second? the average counting rate of a radioactive sample is 486 cpm. Find the probability that in any given 10 second interval one gets less than 72 counts, Is this the same as the probability of getting less than 72*6=432 counts in 60 second ?