Hi,

mean of 7.7 pounds and a standard deviation of 0.95 pounds

Using TI-83 Calculator to Compute Normal Probability Distribution Values:

Press 2nd VARS [DISTR].Scroll down to 2:normalcdf and Press ENTER:

Enter proper values, Press ENTER.

P(Weigh at least 6 pounds) is normalcdf(6,9999,7.7,.95)

Note: The 9999 is used as the larger value to be at least 5 standard deviations from the mean.

P(Weigh less than 5 pounds or more than 10 pounds) = 1 - P(5 ≤ x ≤ 10)

                                                   = 1 - normalcdf(5,10,7.7,.95) 

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