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The Sony Corporation produces a Walkman that requires two AA batteries. The mean life of these batteries in this product is 35.0 hours. The distribution of the battery lives closely follows the normal probability distribution with a standard deviation of 5.5 hours. As a part of their testing program Sony tests samples of 25 batteries.
a. What can you say about the shape of the distribution of sample mean?b. What is the standard error of the distribution of the sample mean?c. What proportion of the samples will have a mean useful life of more than 36 hours?d. What proportion of the sample will have a mean useful life greater than 34.5 hours?e. What proportion of the sample will have a mean useful life between 34.5 and 36.0 hours?
An investment project is expected to earn $100,000 on average with a standard deviation of $50,000. Assume earnings from this investment project is a normal distribution. Of the next 15 people that invest in this project, what is the probability t..
A random sample of 16 students selected from the student body of a large university had an average age of 25 years and a standard deviation of 2 years.
In answering this questions, set up and test appropriate hypotheses using D = 0.01. Construct a 99 percent confidence interval on the true mean difference in breaking strength.
Found mean number of sticks of gum chewed per day was 9. Standard deviation of population is 1. At α = .05, is number of sticks of gum person chews per day actually is greater than 8?
Would you play this game if you wanted to make money? What do we expert the value of the results of the game to be?
A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of µ = 80 and a standard deviation of σ = 20. The researcher expects a 12 point treatment effect and plans to use a ..
Humanities, 372; Natural Science, 415; Social Science, 511; Business Administration, 619; Philosophy, 196. Create a Pareto chart representing this information.
Of the students who scored around 50 on the midterm, about what percentage were in the top 25% of the class on the final?
The population mean of a company's racing bicycles is 9.07 kg (20.0 lb) with a population standard deviation of 0.40 kg. If the distribution is approximately normal
Determine the percentage of samples of size 4 that will have the mean scores within 35 points of the population mean score of 280.
Draw a box-and-whisker plot for the data set. Find the variance and the standard deviation. please help me as soon as possible please!!! thank you
What proportion of sample means would be between 1.31 and 1.33 inches?
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