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Company A ships 1000 parts to company B each day. Company B samples 10 parts from each shipment. Company B uses a scoring system, below 6.2 is nonconforming. If one or more parts are nonconforming the entire shipment is rejected and returned to Company A. Parts test scores produced by company A follow a mean of 7 and standard deviation of 0.30. Over the past 20 days (20 shipments), four have been rejected & returned back to company A. Determine if there is a problem with the parts at company A.
Based on information, compute the following: Percentage (or portion) of children who watch television less than 6.5 hours a week.
How does a t test differ from a z test in terms of when it is used, how it is calculated, and how we determine significance?
If the voice identifications were made by random guess, find the probability that all 9 victims would select the same person?
What is the 95% confidence interval for the mean number of microwaves sold at a retail store in the chain last week?
Construct a 99% confidence interval (Konfidenz interval) for the difference in proportions of all adults and all teenagers who watched the program and liked it.
What is the difference between McNemar's Test and the chi-square test for 2X2 tables? When do we use each test?What is a discordant pair and concordant pair? Also, which type of pair is used in the McNemar's test?
What is the treatment mean square? What is the mean square error? How many groups are included in the study?
The mean numbers of trials to learn maze for the group with the colrful wallpaper is 11. What is the standard deviation of the distribution of means?
Explain the concept of "Regression Analysis", its types (3 types at least), applications and usefulness. Provide real application of its usage. Some times, Maximum likelihood estimation is not applicable, Explain and provide an example?
A statistically significant result occurs when the value of the test statistic falls in the rejection region. A result has practical significance when it is statistically significant
Jack is doing a project in educational psychology. Before the experiment, he rank-orderes all his participants according to achievement test scores.
One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on his bus. Compute the expectations and variances of X and Y?
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