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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?B) What is the standard error of the mean?C) What percent of the sample means will be greater than 140 secondsD) What percent of the sample means will be greater than 128 secondsE) What percent of the sample means will be great than 128 seconds but less than 140 seconds?
A computer password consists of four characters. The characters can be one of the 26 letters of the alphabet. Each character may be used more than once. How many different passwords are possible?
If the mean IQ of all Omega University students was equal to 115, and a small random sample of students was selected from the population whose mean IQ was 120, then this difference of 5 points would equal the:
The radius of the hole and the radius of the shaft. Let the random variable X denote the clearance, in millimeters. The probability density function of X is?
Which of the examples below represent the Ratio level of scaling?
What is the probability that the wait for the second student will be 15 minutes or less (to 4 decimals)? What is the probability that the wait for the second student will be between 15 and 45 minutes (to 4 decimals)?
The area of study is Sampling Methods and the Central Limit Theorem. Consider the digits in the phone numbers on a randomly selected page of your local phone book a population.
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What is the mean and standard deviation of the sampling distribution when we take all samples of size25?
CCI is unable to adjust the mean of the filling process. However, it is able to adjust the standard deviation of the filling process.
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots
An experiment was conducted to compare the effectiveness of three training programs, A, B, and C, in training assemblers of a piece of electronic equipment.
A brand name has 60% recognition rate. if the owner of the brand wants to verify that rate by beginning with a small sample of 5 randomly selected consumers, find the probability that exactly 3 of the 5 consumers recognize the brand name. Also fin..
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