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Answer :
About 46.02% of male babies weigh more than 12 pounds.
To find the proportion of babies that weigh more than 12 pounds, we need to use the normal distribution function on the TI-84 Plus calculator.
- Press the '2nd' button and then press the 'VARS' button to access the distribution menu.
- Select '2: normalcdf(' from the menu.
- Input the values as normalcdf(12, E99, 12.3, 4.7). Here, 12 is the lower bound, E99 represents a very high upper bound (essentially infinity), 12.3 is the mean, and 4.7 is the standard deviation.
- Press 'Enter' to get the result.
This will yield a proportion of approximately 0.4602.
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