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A machine is designed to fill toothepaste tubes with 6 oz. of toothpaste. In order to determine if the machine is under-filling toothpaste tubes, a test of H0:u=6 vs. HA:u<6 is conducted at the .01 level of significance using a random sample of 81 tubes of toothpaste. Assume the population standard deviation is 1 oz. If the true average fill amount is 5.8 ounces, what is the probability that the test will commit a Type II error?
Dr. Stallter has been teaching basic statistics for many years. She knows that 80 percent of the students will complete the assigned problems.
Barron’s reported that the average number of weeks an individual is unemployed is 17.5 weeks (Barron’s, February 18, 2008). Assume that for the population of all unemployed individuals the population mean length of unemployment is 17.5 weeks and that..
The researcher estimated that out of the 100 students at least 50% of the students would be exposed to movies and TV w/ crude humor at least 2-4 times per week.
Students whose test scores are in the upper 10% are eligible for scholarship opportunities for college. What is the test score that corresponds to the upper 10% cutoff point of the probability distribution?
For following set of scores, prepare a frequency distribution, a histogram, and a stem-and-leaf display for each variable. Also calculate the mean, the median and the standard deviation of each score.
Correct answerThe "average" amount of error expected in predictions The number of cases that have a non-zero residual The strength of the correlation between X and Y
Find the indicated percentage for the normally distributed variable. Round your answer to two decimal places, if necessary.
When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be:
A standard deviation of 100, what would be the cutoff score for selecting the top 10% of applicants, assuming that the standardized test is normally distributed?
When we say we have confidence level of 95% what do you believe our "margin of error" is?
Determine the centerline and the upper and lower control limits for a 3-sigma mean control chart in which each sample consists of 4 cylinders
complete the following using the mysoclab social explorer map income inequality by race located on the student website
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