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A popular flashlight that uses two D-size batteries was selected, and several of the same models were purchased to test the "continuous-use life" of D batteries. As fresh batteries were installed, each flashlight was turned on and the time noted. When the flashlight no longer produced light, the time was again noted. The resulting "life" data from Rayovac batteries had a mean of 20.9 hours. Assume these values have a normal distribution with a standard deviation of 1.3 hours. (Give your answers correct to four decimal places.)
(a) What is the probability that one randomly selected Rayovac battery will have a test life between 20 and 21.8 hours?
(b) What is the probability that a randomly selected sample of 6 Rayovac batteries will have a mean test life between 20 and 21.8 hours?
(c) What is the probability that a randomly selected sample of 12 Rayovac batteries will have a mean test life between 20 and 21.8 hours?
(d) What is the probability that a randomly selected sample of 68 Rayovac batteries will have a mean test life between 20 and 21.8 hours?
Generate a training sample of size 100 for each class, as well as a test sample of 5,000 per class. (Best to generate the centroids matrices per class once and store them).
the probability of two or more events occurring concurrently is called aa conditional probability.b empirical
Body mass index is measured as the ratio of weight in kilograms to height in meters squared. Generate a 95% confidence interval estimate of the true BMI.
Suppose the world series is about to begin. Some people get together and each decide to predict different win-loss patterns for the seven possible games during the coming series.
Using the Library, web resources, and/or other materials, find the logarithmic formula that gives the pH of a substance. State what each variable in your equation represents.
Historically, my HRV fleet averaged 40,000 miles between breakdowns with a 8000 mile standard deviation. I implemented Continuous Improvement teams to research better inspection methods and after the kaizen, I sampled, randomly 30 HRV cars and found ..
Gigi has rolled a natural on four straight tosses of the dice. This excites the gamblers standing around the table.
Name an application for the use of ANOVA. This can be in a professional setting, hobby, or something you find on the internet. What are some business situations where ANOVA would be more appropriate than a Z or T test?
suppose the counselor found the sum of squared deviations from the mean of the sample to be 135. given that he tested
The bank wants to find out the waiting time of their customers during the Friday evening hours from 5pm to 8pm. Using the data in ungrouped form, compute the Standard Deviation, using the computational formula.
Perform an appropriate hypothesis test, showing the necessary calculations and/or explaining the process used to obtain the results.
1. consider the random variable x with the probability mass function pie-22iiwhat is px0?2. consider a fair coin. we
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