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A manufacturer of guitar amplifiers markets one of its models, Vagabond, at a power rating of 45 watts. GuitarGod magazine suspects that this rating is in inaccurate for this year's model of the amp. In a random sample of 32 units of this year's version of the Vagabond the mean output power is 42 watts, with a standard deviation of 8 watts Assuming a confidence level of 95%, which of thefollowing statements do these data support?
The manufacturer of an airport baggage scanning machine claims it can handle an average of 530 bags per hour.
From Company B, 850 stereos are purchased and 6% are found to be defective. Given that a stereo is defective, find the probability that it came from Company A.
If the sides of the square are lengthened by 5cm, the area becomes 144cm^2. Find the length of a side of the original square.
Utilizing your charts stated whether the filling operation has been in control for every of the 18 operating hours this day.
In a regression model involving 30 observations, the following estimated regression equation was obtained:
Determine and report the within-group slope which relates Y to Xc (for this, you will have to look at your regression printout).
What is the probability that the drug will be effective for 3 hours or more?
Develop the estimated regression equation that can be used to predict the closing price given the value of Period At the .05 level of significance, test for any positive autocorrelation in the date.
Use the normal approximation to the binomial distribution and part (b) to answer the question: What is the probability that a seat will be available for every person who shows up holding a reservation?
The following table is from the Social Security Actuarial Tables. For each age, it gives the probability of death within one year, the number of living out of an original 100,000 and the additional life expectancy for a person of that age.
Administrators at a university are planning to offer a summer seminar. It costs $3000 to reserve a room, hire an instructor, and bring in the equipment. Assume it costs $25 per student for the administrators to provide the course materials.
It is claimed that 70% of the residents in a large town approve of the current zoning law. Four residents are to be randomly selected. Find the probability that:
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