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In establishing warranty on TV sets the manufacturer wants to set the limits so that few will need repair at manufacturer expense. On the other hand, the warranty period must be long enough to make the purchase attractive to the buyer. For a new TV the mean number of months until repairs are needed is 36.84 with a standard deviation of 3.34 months. Where should the warranty limits be set so that only 10% of the TVs need repairs at the manufacturer's expense?
In healthy adults, x is approximately normally distributed with mean µ = 38 and standard deviation σ = 12. What is the probability that:
What is the p-value associated with the above sample result?
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.50 inches.
Calculate a 95% confidence interval for the mean endowment of all the private colleges in the United States assuming a normal distribution for the endowments.
The Pearson Product-Moment Correlation Coefficient (r) is a measure of linear relationship between two variables.
At.02 significance level is it sensible to conclude that mean number of shoes sold at mall stores is larger than at outlet stores?
Which of the given is the example of a discrete random variable? Which of the given is an example of continuous random variable?
Make your calculation supposing a two-sided two-sample t-test with a type I error (alpha) of 0.056
A local group claims that the police issue more than 60 speeding tickets a day in their area.
It has been estimated that 30% of all farms are family-owned. In a sample of 12 farms, what is the probability that exactly three farms are family owned?
Compute a 95% confidence interval for the mean difference in the percentage of bone loss between two groups.
Create raw score predictions on criterion variable for persons with Z scores on predictor value of -2,-1,0,+1,+2.
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