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Probability values based on normal distribution.
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?
what is the required sample size is the error is to be less than 1/2 hour with a 95% level of confidence?
Is there meaningful relationship between grades and SAT scores? If student scores 450 on the SAT, what do youbelieve his or her GPA will be?
At the .01 significance level, is there a relationship between job pressure and age?
Formulate a linear programming model for this problem.
The Johnson family uses a propane tank for cooking on their gas grill. During the summer they need to replace their tank on average every 30 days.
The sample size n , the sample means, and the sample standard deviations for the two groups are given below.
MATH1550H: Assignment: Question: A word is selected at random from the following poem of Persian poet and mathematician Omar Khayyam (1048-1131), translated by English poet Edward Fitzgerald (1808-1883). Find the expected value of the length of th..
The explanatory variable which is a measure of neighborhood socio-economic status variable RFM. Response variable is percent (%) of bicycle riders that wears a helmet.
Create a scatter plot for the data. Determine the correlation coefficient for the data.
An experiment consists of making 80 telephone calls in order to sell a particular insurance policy.
Find a 90% confidence interval for the population mean weight of all such turtles.
Suppose that 46 percent of families living in a certain country own a car and 18 percent own an SUV. The Addition Rule might suggest, then, that 64 percent of families own either a car or an SUV. What's wrong with that reasoning.
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