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Of the 6500 students enrolled at a community college, 3000 are part time and the other 3500 are full time. The college can provide a list of students that is sorted so that all full-time students are listed first, followed by the part-time students.
a. Describe a procedure for selecting a stratified random sample that uses full-time and parttime students as the two strata and that includes 10 students from each stratum.
b. Does every student at this community college have the same chance of being selected for inclusion in the sample? Explain.
In a test of the effectiveness of a new battery design, 16 battery-powered music boxes are randomly provided with either the old design or the new version. Hours of playing time before battery failure were as follows:
For a randomly selected group of 10 children, use the appropriate statistical table to describe the probability distribution for the number in the sample who are covered by life insurance.
Jan finished culinary school and wants to start her own pastry business. She has a few options, and believes that a sensitivity analysis would help her to make the best business decision. She is considering three options, and is confident that..
Utilizing the .05 level, do the results support the psychologists' theory. Elucidate your answer to somebody whom has never had a course in statistics.
Find the probability that a random selection of 9 songs will have mean length of 186.30 seconds or less. Assume distribution of the lengths of the songs is normal.
Manufacturer of guitar amplifiers markets one of its models, Vagabond, at a power rating of 45 watts. GuitarGod magazine suspects that this rating is inaccurate for this year's model of the amp. In a random sample of 32 units of this year's version o..
Zepolle's Bakery makes a variety of bread types that it sells to supermarket chains in the area. One of Zepolle's problems is that the number of loaves.
Identify the fallacies of presumption, ambiguity, and illicit transference committed by the following arguments, giving a brief explanation for your answer. If no fallacy is committed, write "no fallacy."
If it is rainy or cloudy one day, then there is one chance in two that it will be the same the next day, and if it changes then it is equally likely to be either of the other two possibilities. In the long run, what proportion of days are sunny? W..
Assuming the probability distribution of the sleep time to be normal with a standard deviation of 0.8 hours, compute the following.
What is the probability that a randomly selected U.S. resident did not live in Missouri? Show step by step work. Round solution to the nearest thousandth.
A survey is conducted that includes several hundred students at a large university, all taking an introductory statistics course
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