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The Dean of Instruction at a local college requested that a new standardized test for an introductory statistics course be developed with the requirement that it should have µ = 120 points and σ = 15. A class of 30 students complete the new test with a mean grade of 115. Conduct a hypothesis test at α = .05 to determine whether the claim that µ = 120 can be supported. Use the p-value approach and complete the following to show how this would be done.
What is unusual about the this hypothesis test?
If it is rainy or cloudy one day, then there is one chance in two that it will be the same the next day, and if it changes then it is equally likely to be either of the other two possibilities. In the long run, what proportion of days are sunny? W..
There is a worker error is 0.3, and the probability that an accident will occur when there is no worker error is 0.2. Find the probability of a worker error if there was an accident.
Three different methods for assembling a product were proposed by an industrial engineer. To investigate the number of units assembled correctly with each method
A distribution of exam scores in Sociology 100 for the past five years has a mean of 75 and a standard deviation of 20.
Describe the relationship between sales and advertising expenditure. Include an explanation of the lagged relationship. When does advertising have its greatest impact
What new Analytics tool needs to be invented and why? What personal needs do you have that would benefit from such a new tool?
Florida State University administers a mathematics placement test to students where they 1st enter the university.
The table below gives the loan requests (in thousands of dollars) for the past 12 months. Would you say that the local business economy is heating up or cooling down? Explain your answer. Graph the data.
If the selected worker found a job with a new company in the same field, what is the probability that the worker is a union member?
A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations. (b) Calculate a p-value and interpret it.
Use the equation to determine the college GPA of a student whose high school GPA is 2.5. Round your answer to two decimal places.
State the general relationship between consumption Y and disposable income X in (a) exact linear form and (b) stochastic form. (c) Why would you expect most observed values of Y not to fall exactly on a straight line?
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