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At the beginning of the course of Statistical Methods I, the instructor recommended that students devote 3 hours per week for the duration of the 13-week semester, for a total of 39 hours. It is known that the times spent on studying statistics follow a normal distribution. Throughout the course's duration, students were claiming that they were following the instructor's recommendation. At the course's completion, a random sample of 10 students enrolled in the course was drawn where each student was asked how many hours he or she spent doing homework in statistics. The data are listed below:
45
38
37
40
44
46
42
43
While dealing with 16 students, suppose that the alternative hypothesis has been one-sided and that it was set as Ha : < 39. Make a graph to visualize the problem.
Determine the point estimate in this study? Compute the standard error in this example?
Assume duration of human pregnancies follow mound-shaped distribution with mean of 266 days and the standard deviation of 16 days.
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Below are the sample times in minutes. At the .05 significance level, can we conclude that there is a difference in their mean times?
Formulate the hypotheses to determine whether or not the lathe is in perfect adjustment.
What is the probability that more than 265 will be relieved of the nasal condition?
At the .01 significance level, is there a relationship between job pressure and age?
Woodco manufactures tables and chairs. Each table and chair must be made entirely out of oak or entirely out of pine. A total of 150 board feet of oak and 210 board feet of pine are available.
Give a mathematical expression for the probability density function of driving distance.
Electronic baseball games manufactured by Tempco Electronics are shipped in lots of 25. Before shipping, a quality control inspector randomly selects a sample of 6 from each lot for testing. If sample contains any defective games, the entire lot i..
Determine the probability that the project will be completed in 70 days or less.
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