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An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find the 99% confidence interval for µ, the average annual salary of all high school teachers.
A. (54837.9 , 58142.1)
B. (54637.9 , 60142.1)
C. (54607.2 , 58372.8)
D. (55398.7 , 57581.3 )
A coin was flipped 60 times and came up heads 36 times. Determine the critical value you would use to test whether proportion of heads is greater than 0.50 at 10% level of significance?
let the number of trials be n = 3, and let the probability of success be p = 0.0228. Use a calculator to compare:
Recognize the midpoint of the first class. Recognize the class boundaries of the first class.
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
Project was estimated by using ADM/PERT analysis. Due to extensive length of project many activities were combined; Following is the result.
Formulate the hypotheses that can be used to determine whether the mean of all account balances is significantly different from $1,150
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
You will investigate four different scenarios of population growth also decline in this town. Graph the model as well as investigate it by four different growth models.
The standard deviation of the differences d for the paired sample data s d = ____________
Describe the difference in the fit provided by the two estimated regression equations.
Create a scatterlpot of P_RFM and P_HELM. If drawing plot by hand, use graph paper to make sure accuracy. Be sure you label axes. After you have created the scatterplot, consider its form and direction. Recognize outliers, if any.
Suppose that data is recorded for equal period of "before"-"after" time. Use 1% level for risk. Given processed data, explain what John must do.
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