What is the standard error of the mean in seconds

Reference no: EM13231478

CRA CDs, Inc., wants the mean lengths of the "cuts" on a CD to be 135 seconds (2 minutes and 15 seconds). This will allow the disk jockeys to have plenty of time for commercials within each 10-minute segment. Assume the distribution of the length of the cuts follows the normal distribution with a population standard deviation of 8 seconds. Suppose we select a sample of 16 cuts from various CDs sold by CRA CDs, Inc.

(a) What can we say about the shape of the distribution of the sample mean (binomial, normal, or uniform)?

(b) What is the standard error of the mean (in seconds)?

(e) What percent of the sample means will be greater than 128 but less than 140 seconds?

Reference no: EM13231478

Questions Cloud

Briefly describe mcdonald value chain : Briefly describe McDonald's value chain and discuss how information systems facilitate each component in the chain. how could information technology improve your next trip to Mcdonalds?

Why should the small business owner consider the demographic : Why should the small business owner consider the demographics of an area when choosing a location for opening a new business? Name some sources of demographic information that are valuable tools to use in this evaluation.

Discuss the challenges human resource managers face : research and create a four page formatted document in which you discuss the challenges human resource managers face in the workplace today !

Describe the photosynthesis and enzymes : distinguish C3 photosynthesis from C4 photosynthesis and name the enzymes, chemicals, and plants of both groups

What is the standard error of the mean in seconds : CRA CDs, Inc., wants the mean lengths of the "cuts" on a CD to be 135 seconds (2 minutes and 15 seconds). This will allow the disk jockeys to have plenty of time for commercials within each 10-minute segment. Assume the distribution of the length

Puritan protectorate in england : What best characterizes the period of time during the Puritan Protectorate in England?

Develop a system approach to performance appraisal : Develop a system approach to performance appraisal that combines a group of appraisers, various times for appraisal, and a variety of instruments. Identify when each element would be best suited for a specific need.

Explain the calorie content of foods indicates : A list of the calorie content of foods indicates that a 10 oz chocolate thick shake contains 331 Calories. Express this value in kJ and in J

Calculate charges to determine the charge for each customer : A parking garage charges a $2.00 minimum fee to park for up to three hours. The garage charges an additional .50 per hour for each hour or part thereof in excess of three hours.

User Account

All Pages