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Which of the following is not a decision variable when formulating the project crashing problem as a linear program?
the early finish times of critical activities
the early finish times of non critical activities
the start time of the project
the finish time of the project
the early start times of all activities
A researcher is investigating the effectiveness of a new study-skills training program for elementary school children. A sample of n= 25 third grade children and each child is given a standardized achievement test at the end of the year.
one prominent physician claims that 70 of those with lung cancer are chain smokers. if his assertion is correcta find
Based on the answers to a through d, decide whether or not to reject the null hypothesis at the given significance level. Explain your conclusion in the context of the problem.
In a study, the carapace lengths (in mm) of Thenus lobster caught near Singapore measured: 78,66,65,63,60,60,58,56,52 and 50 ( the population data is approximately normal).
At the .05 level of significance, is there evidence of a difference in variability in the shipping time between the two outlets? What decision should the carpet manufacturer make?
the probability of a successful missile launch is 0.9. test launches are conducted until 3 successful launches are
A geologist has collected 10 specimens of basaltic rock and 10 specimens of granite. The geologist instructs a laboratory assistant to randomly select 15 of the specimens for analysis.
generate two random numbers between 0 and 1 and take x to be their sum. the sum x can take any value between 0 and 2.
Scores on test form normal distribution with mean of µ = 150 and a standard deviation of σ = 25. Mean for sample is M = 158. Compute test statistics (z score) for sample.
What is the 95% confidence interval for the standard deviation of birth weights at County General Hospital, if the standard deviation of the last 25 babies born there was 1.1 pounds.
Determine the 90% confidence interval estimate for the median number of hours of television watched per week by shut-ins.
a doctor wants to estimate the hdl cholesterol of all 20-to 29- year-old females. how many sunjects are needed to
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