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The mean television viewing time for teens is 3 hours per day. Assume = 3 and population standard deviation is = 1.2 hours. Suppose a sample of 50 teens will be used to monitor television viewing time. Let denote the sample mean viewing time. What is the probability the sample mean will be within 0.25 hours of the population mean?
What are the assumptions of regression analysis and how do you evaluate them?
If Chebychev Inequality gives the lower bound for probability. For the present problem the lower bound for the probability is 0.75 and actual probability is 0.87.
Suppose the world series is about to begin. Some people get together and each decide to predict different win-loss patterns for the seven possible games during the coming series.
If writing scores for population have standard deviation of s = 20, does sample give sufficient evidence to conclude that new composition course has significant effect? Suppose a two tailed test with a = 0.05.
A box contains four 40-W bulbs, five 6-W bulbs and six 70-W bulbs, if three bulbs are selected without replacement randomly. What is the probabilty that three are 70-W bulbs?
The Warren County Telephone Company claims in its annual report that "the typical customer spends $70 per month on local and long-distance service.
The mean construction time for a standard two-car garage by Arrowhead Construction Company is 3.5 days. The time for the construction process follows the normal distribution.
Find the probability that the age of a randomly selected CEO will be between 56-57 y/o. (round to 4th decimal) The probability a randomly selected CEO will be between 56-57 y/o is?
Significant increase in the mortality of lung cancer in both genders, but no significant effect was observed at lower levels." Is this an observational study or an experiment? Fully explain your reasoning.
How would you explain to another student the difference between compound interest and continuous compound interest to a friend?
What is the predictive value of a negative test result? In other words, what is the probability that an individual who returns a negative tests for hypertension is not hypertensive? Please give your answer to 3 decimal places.
Determine how self confident a person may be. Analysis and Justification. Prepare an analysis of how you developed your instrument.
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