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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?
Select the suitable hypothesis.H 0 : π ≥ .052; H 1 : π 0 if z
A local college requires an English composition course for all freshman. This year they are evaluating a new online version of the course. A random sample of n=16 freshman is selected and the students are placed in the online course.
At.01 level of significance, is proportion of seeds which germinate dependent on seed type?
Formulate a linear program that can be used to determine the number of hours each graphic designer should be assigned to the project in order to minimize total cost. What is the total cost?
Forty percent of the homes constructed in the Quail Creek area include a security system. Three homes were selected at random. What is the probability all three homes selected have a security system?
On a test, a sample of 5 students has a mean score of 78. The scores of four students of them are: 87, 81, 76, 53. Find the test score of the fifth student and standard deviation of this sample.
The test statistic for a two-sided significance test for a population mean is z = -2.12. What is the corresponding P -value?
It falls into the region of alternative is accepted greater than .95
Clouds were randomly seeded or not with silver nitrate. Rainfall amounts were recorded from the clouds. The purpose of the experiment was to determine if cloud seeding increases rainfall. The following data is obtained:
The mean annual salary paid to all employees in a company was EURO 30.000. The mean annual salaries paid to male and female employees of the company were EURO 32.000, and 24.000, respectively. Determine the percentage of males and females employed..
Would you expect the mean absolute percentage error to be more than or less than 0.25? Describe.
Using the following information, find the equation of the regression line, and predict the heart rate when 0.27 milligrams of the drug is used.
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