Mathematics, 01.09.2019 01:10, imbadatmath56

The amount of time ricardo spends brushing his teeth follows a normal distribution with unknown mean and standard deviation. ricardo spends less than one minute brushing his teeth about 40% of the time. he spends more than two minutes brushing his teeth 2% of the time. use this information to determine the mean and standard deviation of this distribution

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The amount of time ricardo spends brushing his teeth follows a normal distribution with unknown mean...