Nancy Joon, Inc

question 38

Short Answer

Nancy Joon, Inc. has 1500 employees. A simple random sample of 81 employees was selected, and the individuals in the sample were asked how much they contribute (monthly) to their retirement accounts. The sample mean, , was $150 with a standard deviation, s, of $45.
a.Estimate the standard error of the mean.
b.Develop an approximate 95% confidence interval for the population mean.

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Definitions:

Electrical Pressures

Electrical pressures, often referred to as voltage, are the potential difference between two points in an electrical circuit, driving the flow of electric current.

J1939 Data Backbone

A high-level protocol used in heavy-duty vehicles for networking and communication among vehicle components over a CAN bus.

Terminating Resistor

Used to prevent the twisted-wire pair used in a data bus from attracting signal interference by acting like a giant antenna. A current data bus uses two terminating resistors that test at 120 ohms. If one is missing, the data bus may function erratically, but if both are missing, no effective networking can take place.

J1939 Data Backbone

A part of the J1939 standard providing a means for the integration of various vehicle components over a common network, allowing them to communicate information.