True mean and confidence level

Reference no: EM13105280

A nursing school wants to estimate the true mean annual income of its alumni. It randomly samples 120 of its alumni. The mean annual income was $58,700 with a standard deviation of $1,500. Find a 95% confidence interval for the true mean annual income of the nursing school alumni. Write a statement about the confidence level and the interval you find.

Reference no: EM13105280

Questions Cloud

Policyholders randomly selected for company records : An auditor for Health Maintenance Services of Georgia reports 40% of policyholders 55 years or older submit a claim during the year. Fifteen policyholders are randomly selected for company records.

What was her average speed for that half-lap : A runner covers one lap of a circular track 40.0m in diameter in 63.5s a) average speed for that lap? b) average velocity for that lap? c) If she covered the first half-lap in 28.6s , what was her average speed for that half-lap?

Security risk to acknowledge using macros : Write down 200- to 300-word response which answers the following question: Based on article by Lenning (2005), what is main security risk which users must acknowledge when using macros?

Economic naturalist writing assignment : Use a principle, or principles, discussed in the course to explain some pattern of events or behaviour that you personally have observed.

True mean and confidence level : A nursing school wants to estimate the true mean annual income of its alumni. It randomly samples 120 of its alumni. The mean annual income was $58,700 with a standard deviation of $1,500.

What are some of the operation management practices : Illustrates what are some of the operation management practices that can help bring manufacturing back to the U.S.? Explain how can a focus on quality improve manufacturing?

Determine the cycle time : Westside Auto purchases a compant used in the manufacture of automobile generators directly from the supplier. Westside's generators production operation which is operated a constant rate.

How long will the shadow of the mast be on the bottom : A ship's mast reaches to a height of 15 meters above the surface of a 10-meter-deep lake. When the sun is 30° above the horizon, how long will the shadow of the mast be on the bottom of the lake?

Comprise in the memo your suggested offer of settlement : Comprise in the memo your suggested "offer of settlement" to Virginia. Back up your offer using your analysis of the case against Teddy's

User Account

All Pages