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A gambler claims that when an ancient coin is tossed, tails comes up too often. As an experiment, the coin is tossed 900 times. It comes up tails on 785 of these tosses. Is this strong evidence for the gambler's claim? a) State the null (H0) and alternative (Ha) hypotheses. b) If the null hypothesis is true, the sample mean has approximately a Normal distribution with mean __________ and standard deviation __________________. c) Give the standard score for the data. d) Find the P-value for this significance test. e) Summarize the conclusion in the context of this problem.
assuming all test scores are different you would like to determine the relative test scores of three classmates using
A field researcher is gathering data on the trunk diameters of mature pine and spruce trees in a certain area. The following are the results of his random sampling. Can he conclude, at the 0.10 level of significance, that the average trunk diame..
you plan to conduct a survey to find what proportion of the workforce has two or more jobs. you decide on the 99
If a linear model is first-order in three independent variables, what type of geometric relationship will you obtain when E(y) is graphed as a function of one of the independent variables for various values of the other independent variables?
A history class is comprised of 5 female and7 male students. If the instructor of the class randomly chooses 5 students from the class for an oral exam, what is the probability that 3 female students and 2 male students will be selected? Roun..
The data given below are from a random sample of height (in inches) and weight (in pounds) of seven basketball players.
Write out the goals for a public health or medical study that you would like to do. What type of study will you use?
Sample statistics were calculated and a hypothesis test carried out. The p-value was found to be 0.04. At the 5% level of significance, which of the following statements is most appropriate?
Write up a brief description of the problem with the conclusion drawn from the hypothesis test. Note that the problem is not in the calculations--assume the calculations are correct--but in the interpretation of the test.
the following data represent the number of miles per gallon achieved on the highway for small cars for the model year
How many more observations are necessary for the efficiency expert to be 95% sure that the point estimate x¯ will be in error from the true mean p by at most 15 seconds and find a 75% confidence interval for the population mean number of cars per su..
question abc airlines operates 50 seat planes between albany and boston. for tomorrows flight it has accepted 62
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