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Technical data provided with a room dehumidifier explain that units tested from the production line consume a mean of 800 watts of power, with a standard deviation of 12 watts. The superintendent of a large office complex, upon evaluating 30 of the units recently purchased and finding their mean power consumption to be 805 watts, claims that her shipment does not meet company specifica- tions. At the 0.05 level of significance, is the superintendent's complaint justified?
Repetitions of numbers are not permitted, i.e., the same number cannot be used more than once in a total sequence. As examples, 27, 94 or 55 would not be permitted. How many different code groups can be designed?
At least half the patients are under 15 years old? First, describe how this can be modelled as a binomial distribution with 8 trials, where success is visitor age is under 15 years old and the probability of success is 20 percent.
A normal distribution has a mean of 80 and a standard deviation of 14. Determine the value above which 80 percent of the values will occur.
1. if x is a binomial random variable with parameters n and p show that y n?x is also a binomial random variable. what
a recent poll of 700 people who work indoors found that 278 smoke. if the researchers want to be 98 confident of their
in the game of keno if you make a 1 bet on a pair of numbers you have a 94 chance of losing and thus losing your one
The mean value of her net gain/loss will again be $2000? What if she repeats the experiment 10 times? Respond to at least two of your classmates' postings.
of all college freshmen who try out for the track team the coach will only accept 30. if 15 freshmen try out for the
Describe the sample space ?. What is the probability that three tosses will be required?
Test the equality of the means of three populations.
Time to help a stranger was investigated by a group of undergraduate psychology majors as a part of their Introduction to Research Methods course.
As part of the National Health and Nutrition Examination Survey, the Department of Health and Human Services obtained self-reported heights and measured heights for males aged 12-16. All measurement is in inches. Listed below are sample results.
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