STAT Speech or Presentation Example | Topics and Well Written Essays - 1500 words

STAT - Speech or Presentation Example The mean credit card debt among households in one state is $8400. A hypothesis test is to be performed to decide whether the mean credit card debt for households in the formerly affluent town of Rich-No-More differs from the mean credit card debt for the state At one school, in 2005, the average amount of time that tenth-graders spent watching television each week was 21.6 hours. The principal introduced a campaign to encourage the students to watch less television. One year later, in 2006, the principal performed a hypothesis test to determine whether the average amount of time spent watching television per week had decreased. The hypotheses are: A correct decision would occur if, in fact, ÃŽ ¼ = 21.6 hours, and the results of the sampling do not lead to rejection of that fact; or if, in fact, ÃŽ ¼ A correct decision would occur if, in fact, ÃŽ ¼ = 21.6 hours, and the results of the sampling do not lead to rejection of that fact; or if, in fact, ÃŽ ¼ A correct decision would occur if, in fact, ÃŽ ¼ = 21.6 hours, and the results of the sampling lead to rejection of the null hypothesis; or if, in fact, ÃŽ ¼ A sample mean, sample size, and population standard deviation are given. Use the one-mean z-test to perform the required hypothesis test about the mean, ÃŽ ¼, of the population from which the sample was drawn. A researcher wishes to estimate the proportion of people within a certain population who are in favor of a national health care system. Obtain a sample size that will ensure a margin of error of at most 0.01 for a 95% confidence interval. A nationwide study of American homeowners revealed that 65% have one or more lawn mowers. A lawn equipment