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Normal Distribution
THIS IS ONE SINGLE QUESTION WITH 2 STEPS. PLEASE, PLEASE HELP! I DON'T UNDERSTAND THIS ONE.
Exam scores in a MATH 1030 class is approximately normally distributed with mean 86 and standard deviation 6. Round answers to the nearest tenth of a percent.
a) What percentage of scores will be less than 88? %
b) What percentage of scores will be more than 81? %
c) What percentage of scores will be between 80 and 87?%
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Determine the mean, median and variance for this sample data. Construct a histogram and explain why the observed shape is not surprising, given the nature of the phenomenon in question.
Pisano et al (2005) studied the "diagnostic performance of digital versus film mammography for breast cancer screening." About 40,000 women participated in the trial; each subject was screened by both methods.
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