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Using SPSS, find a 98% confidence interval for the true mean checking account balance for local customers.
For questions that require calculations, all calculations should be shown, not just the final answer. For questions that require an answer using SPSS, the Variable View, Data View, and Output Panel screens should be copied and pasted to your exam. Answer all questions on the exam thoroughly. Create a Microsoft Word document, including the question number, the question, your typed answer, and SPSS screens if required. You may use Wordâ??s equation editor to complete your answers. 1) A newspaper article about the results of a poll states: “In theory, the results of such a poll, in 99 cases out of 100 sho uld differ by no more than 5 percentage points in either direction from what would have been obtained by interviewing all voters in the United States.” Find the sample size suggested by this statement. 2) A savings and loan association needs information concerning the checking account balances of its local customers. A random sample of 14 accounts was checked and yielded a mean balance of $664.14 and a standard deviation of $297.29. Using SPSS, find a 98% confidence interval for the true mean checking account balance for local customers. 3) Test the claim that for the adult population of one town, the mean annual salary is given by Sample data are summarized as and Use a significance level of 4) Use the P-value method to test the claim that the population standard deviation of the systolic blood pressures of adults aged 40-50 is equal to The sample statistics are as follows: Be sure to state the hypotheses, the value of this test statistic, the P-value, and your conclusion. Use a significance level of 0.05. 5) The maximum acceptable level of a certain toxic chemical in vegetables has been set at 0.4 parts per million (ppm). A consumer health group measured the level of the chemical in a random sample of tomatoes obtained from one producer. The levels, in ppm, are shown below. 0.31 …
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