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A manufacturer claims that the mean life of batteries manufactured by his company is at least 44 months. A random sample of 40 of these batteries was tested, resulting in a sample mean life of 41 months with a sample standard deviation of 16 months. Test at α = 0.01 whether the manufacturer's claim is correct.
if your analysis notes that males in a weight loss program differ from females in amount of weight lost based on the
If one person is selected at random from these young ones, find the probability that this person is employed given that the person is male.
consider a virus that is spread by transfusions of blood contaminated by the virus a person receiving contaminated
Make a decision regarding the null hypothesis based on the sample information. Interpret the results of the test and state your conclusion.
Choose the proper conclusion regarding the claim that the population have different variances.
You are choosing between the following investment strategies: Invest $200 in stock A. Stock A costs $20 per share. Expected yield per share of stock A is $2, and the variance of yield per share is 9 ($-squared). Which investment strategy has the hi..
the distribution of heights of adult men in the u.s. is approximately normal with mean 69 inches and standard deviation
The weight of the oranges, in pounds (1 pound = 16 ounces) is a random variable with standard deviation
What sample size is necessary for a study to determine the average cost of a child delivered at a local hospital within the past three months?
The average age for employees at an amusement park is 24 years old with a standard deviation of 2.5 years. Suppose random samples of 40 employees are selected. What would the distribution of average ages from samples of this size look like? Why?
in a random sample of 40 felons convicted of aggarvated assault it was determined that the mean length of sentencing
With a population standard deviation of 15. Use the 95% confidence interval. Approximately how many Kleenexes should go in the automobile glove compartment boxes?
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