The weekly salary paid to employees of a small company that supplies part-time laborers averages $700 with a standard deviation of $400.(a) If the weekly salaries are normally distributed, estimate the fraction of employees that make more than $300 per week.(b) If every employee receives a year-end bonus that adds $200 to the paycheck in the final week, how does this change the normal model for that week?(c) If every employee receives a 5% salary increase for the next year, how does the normal model change?(d) If the lowest salary is $300 and the median salary is $500, does a normal model appear appropriate?
(a) If the weekly salaries are normally distributed, the fraction of employees that make more than $300 per week is approximately nothing.
(Type an integer or a fraction.)

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