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A sample mean, sample size, and population standard deviation are given. Use the P-value approach to perform a one-mean z-test about the mean of the population from which the sample was drawn.
x bar= 78, n = 28, sigma = 11, Hnought: mu=72, Hone: mu>72 , alpha = 0.01
First find the proper z value then use this to find the p-value.
Enter the p-value - x.xxxx
Please explain step-by-step how to solve this hypothesis testing problem.
If a randomly selected student is a female student, what is the probability she is a C student?
The box plots below show the real estate values of single values of single family homes in two neighboring cities, in thousands of dollars.
Using the 0.95 degree of confidence, what is the interval estimate for the population proportion (to the nearest tenth of a percent)?
What method has been used to transform Model 1 to Model 2? Equations for Model 1 and Model 2 are as follows:
Last week Sarah had exams in Math and in Spanish. On the Math exam, the mean was u, = 30 with a = 5, and Sarah had a score of X - 45. On the Spanish exam, the mean was u, = 60 with 0 = 6 and Sarah had a score of X = 65. For which class must Sarah ..
Of the nine members of the board of trustees of a college, five agree with president on a certain issue. The president selects three trustees at random and asks for their opinions. What is the probability that at least two of them would agree with..
Explain why a confidence interval for a predictor coefficient is equivalent to a 2-tailed test of significance?
Suppose the FBI set of goal of 10% for breakins, and they want to see if the current data show they are below that mark. What are the appropriate null and alternative hypotheses?
Penultimate Support Systems makes fairly good speaker and equipment support stands for music groups. The assembly process involves two operations
The following data from a sample of 100 families show the record of college attendance by fathers and their oldest sons: in 22 families, both father and son attended college; in 31 families, neither father nor son attended college; in 12 families,..
A researcher believes that if she uses a different text the students will score differently on the standardized test but she doesn't know what the difference is.
Which of the given experiments can be modelled by Poisson distribution?
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