So based on the Central Limit Theorem and rules the normal distribution, we know that approximately 95% of sample means will be within 2 (1.96 to be more exact) standard errors of the true population mean.
To apply for a Delaware driver's license, you must: Be at least 18 years old or have met the graduated driver's licensing (GDL) requirements. Have held your learner's permit for at least 10 days.
If you already have a Delaware state plumber's license, you do not need a license to do pump installation work. Contact: To qualify for a license you must be at least 18 years old and have at least two years related experience.