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Determine the critical region and critical values for z that would be used to test the null hypothesis at the given level of significance, as described in each of the following:
Ho:mean less than or = to 82 and Ha:mean is greater than 82, a=0.10
Ho:mean=44 and Ha:mean is not equal to 44, a =0.01
Ho:mean greater than or = to 17 and Ha:mean is less than 17, a=0.05
R.C. Geary wrote some 70 years ago that "Normality is a myth. There never was, is, nor will there ever be a Normal distribution".
If random sample of size n = 16 are selected, can we say anything about the xbar distribution of sample means?
The F test is used in Analysis of Variance (ANOVA). When would a researcher use an ANOVA? Explain (one paragraph in length).
Determine fraction of employees cost between $1,500 and $2,000 per year?
If gambler rolls two dice and gets sum of four, he wins $10; and if he gets sum of three, he wins $25. Cost to play game is $5. What is expectation of this game?
Now compute the standard deviation for this distribution.
Formulate the hypothesis that can be used to determine whether the sample data support the hypothesis that the mean fuel efficiency rating for midsize cars is greater than the mean fuel efficiency for large cars.
Identify at your place of work (or a previous place of work, or an organization with which you are affiliated). Identify a dependent variable and 3 independent variables
What is the probability that the mean life-span of a sample of 64 randomly selected bulbs will exceed 727 hours?
Provide a discussion that supports the assumption that the variance of savings increases with family income.
ABC Corporation of California publishes a variety of statistics, including the number of individuals who got a new job during the past 12 months and the mean length of time the individuals have been on the job.
Our decisions depend on how the options are presented to us. Here's an experiment that illustrates this phenomenon. Tell 20 subjects that they have been given $50 but can't keep it all.
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