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Use the given degree of confidence and sample data to construct a confidence interval for the population mean x. Assume that the population has a normal distribution.
The principal randomly selected six students to take an aptitude test. Their scores were:
77.9 89.1 80.7 78.6 74.4 82.0
Determine a 90 percent confidence interval for the mean score for all students.
76.36 < x < 84.54
84.64 < x < 76.26
76.26 < x < 84.64
84.54 < x < 76.36
A confidence interval estimate for the population mean is given to be (40.45, 49.24). If the standard deviation is 11.159 and the sample size is 35, answer each of the following (show all work):
Linear programming problems. Computethe following linear programming problem. Among which of the following points (X,Y) is feasible.
Determine the p-value; and at 95% confidence, test the above hypotheses.
Is there a difference in the mean allowances nationally and the mean allowances in northwestern Ohio for nine-year-olds?
Compute the test statistic for the goodness of fit test. At 95% confidence using the p-value approach, test the hypotheses. What do you conclude about the distribution?
Create the 95% confidence interval for portion of respondents who feel president is doing a good job. Based on the intervalin part(a), It is sensible to conclude that majority.
Assume that the duration of human pregnancies can be described by a normal model with mean 268 days and standard deviation 17 days. What percentage of pregnancies should last between 260 and 270 days?
What role of operations that applies when you are solving an equation does not apply when you are solving an inequality? What is the inherent meaning and justification of cross-multiplication as it applies to solving an inequality?
Barbara Flynn is in charge of maintaining hospital supplies at General Hospital. During the past year, the mean lead time demand for bandage BX-5 was 60 (and was normally distributed).
An average computer mouse inspector can inspect 60 mice per hour with a population standardx deviation of 10 mice per hour. The 48 computer mice inspectors at a particular factory can only inspect 55 mice per hour. Does the company have reaseon to..
The population standard deviation was 1.68 years. Using the 99% degree of confidence, what is the confidence interval for the population mean.
Would the method described above be a good way to determine which team was taller (explain why or why not)?
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