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A poll reported that 80% of adults were satisfied with the job major airlines were doing. Suppose 12 adults are selected at random and the number who are satisfied are recorded. find the probability that 9 or more are satisfied with the airlines b)between 3 and 6 adults, inclusive, were satisfied.
Complete the table and answer the following questions. Use the .05 significance level.
If desired confidence level is 95 percent, suitable critical value is?
Five test vehicles of each kind were crashed, with results given below. Research question: Are mean crash damages the same for these 3 vehicles?
The new study is going to use the confidence level of 90%. The estimator or appreciative must be in 1% of the population proportion. Which is the necessary size of the sample?
Generate three random observations from the uniform distribution between -10 and 40 by using the following random numbers:
Two letters are chosen at random without replacement from word statistical. Determine the probability that both letters are s?
There are three versions of a board game released - version 1, version 2, and version 3. The versions are distributed equally and evenly among all potential sellers of board games.
Machine X test unit cost $3000 with beta=3 and theta=500, Machine Y test unit cost $2000 with beta=3 and theta=400. If the machines oil fixtures has life of 20 hrs, which machine goes to market first?
How does the efficiency of a regression predict the power of the t-test? How do robust standard errors change the comparison between hypothesis testing using OLS and robust regression? What does dependence in the e do to the t-test? what does non-no..
Determine and plot the probability mass function and probability distribution function of the contract award amount (in millions of dollars).
Recognize the given samples are independent samples or matched pairs.
Describe whether the data appear to be approximately normally distrusted by .. a. Comparing data characteristics to theoretical properties.
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