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At one high school, the average amount of time tenth-graders spend watching television each week is 21.6 The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine whether the average amount of time spent watching television per week has decreased.?
the following cross tabulation shows household income by educational level of the head of household statistical
A doctorhas developed an experimental drug for toe-nail fungus. He needs to test it out on some people to make sure it works. He has a list of 2000 people who could be potential subjects in his study. 1120 of these potential subjects have toe ..
Determine the mean and standard deviation of following probability distribution.
Patient does not have disease occurs 1% of the time. If a randomly selected individual is positive what is the probability that the individual has the disease?
Ann and Jim, two employees in a fast-food restaurant, play the following game while waiting for customers to arrive: Jim pays Ann 2 cents if the next customer does not arrive within 1 minute; otherwise, Ann pays Jim 2 cents. Determine Jim's averag..
quality control is an important issue at acme company which manufactures light bulbs. in order to conduct testing of
According to Chebyshev's Theorem, how many students scored between 57 and 93? Assume that the distribution is normal. Based on the Empirical Rule, how many students scored between 57 and 93?
a large manufacturing firm tests job applicants who recently graduated from college. the test scores are normally
A product is made up of two subsystems in parallel. Subsystem one consists of ten elements in series each with a failure rate of 1/100. The second subsystem consists of 5 elements in series each with a failure rate of 1/200. What is the overall re..
Tthe hypothesis test used (normal curve, single sample t-test, dependent samples t-test, independent samples t-test, ANOVA). For situations 1, 3, 4, and 5, also state whether the test is unilateral or bilateral.
you are considering buying a new house in a new city. you want to know the average price of the houses in a new
Calculate x2, s2 and s for the expense data. Show that the two different formulas for calculating s2 give the same result.
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